Two Themes
Here are two gtk themes that I created for
use with xubuntu. The first one depends on the clearlooks engine:

# Xedgy-Clearlooks theme for Xubuntu
# Based on Clearlooks
# Created by Peter Durrill.
style "clearlooks-default"
{
GtkButton ::default_border = { 0, 0, 0, 0 }
GtkRange ::trough_border = 0
GtkPaned ::handle_size = 6
GtkRange ::slider_width = 15
GtkRange ::stepper_size = 15
GtkScrollbar ::min_slider_length = 30
GtkCheckButton ::indicator_size = 12
GtkMenuBar ::internal-padding = 0
GtkTreeView ::expander_size = 14
GtkExpander ::expander_size = 16
xthickness = 1
ythickness = 1
fg[NORMAL] = "#101010" # dark grey
fg[PRELIGHT] = "#101010" # dark grey
fg[ACTIVE] = "#000000" # black
fg[SELECTED] = "#ffffff" # white
fg[INSENSITIVE] = "#aaaaaa" # dark white / grey
bg[NORMAL] = "#f5f5f5" # white / light grey
bg[PRELIGHT] = "#ffffff" # white
bg[ACTIVE] = "#f0f0f0" # mid white / light grey
bg[SELECTED] = "#51739c" # blue
bg[INSENSITIVE] = "#f5f5f5" # white / light grey
base[NORMAL] = "#f5f5f5" # white / light grey
base[PRELIGHT] = "#51739c" # blue
base[ACTIVE] = "#aaaaaa" # dark white / light grey
base[SELECTED] = "#51739c" # blue
base[INSENSITIVE] = "#f5f5f5" # white / light grey
text[NORMAL] = "#000000" # black
text[PRELIGHT] = "#000000" # black
text[ACTIVE] = "#ffffff" # white
text[SELECTED] = "#ffffff" # white
text[INSENSITIVE] = "#aaaaaa" # dark white / light grey
engine "clearlooks" {
menubarstyle = 2 # 0 = flat, 1 = sunken, 2 = flat gradient
menuitemstyle = 1 # 0 = flat, 1 = 3d-ish (gradient), 2 = 3d-ish (button)
listviewitemstyle = 1 # 0 = flat, 1 = 3d-ish (gradient)
progressbarstyle = 0 # 0 = candy bar, 1 = flat
}
}
style "clearlooks-wide" = "clearlooks-default"
{
xthickness = 2
ythickness = 2
}
style "clearlooks-button" = "clearlooks-default"
{
xthickness = 3
ythickness = 3
}
style "clearlooks-check" = "clearlooks-button"
{
text[NORMAL] = "#336699" # blue
text[PRELIGHT] = "#6699cc" # blue
}
style "clearlooks-notebook" = "clearlooks-wide"
{
bg[NORMAL] = "#f0f0f0" # mid white / light grey
bg[INSENSITIVE] = "#ffffff" # white
}
style "clearlooks-tasklist" = "clearlooks-default"
{
xthickness = 5
ythickness = 3
}
style "clearlooks-menu" = "clearlooks-default"
{
xthickness = 2
ythickness = 1
bg[NORMAL] = "#ffffff" # white
}
style "clearlooks-menu-item" = "clearlooks-default"
{
xthickness = 2
ythickness = 3
fg[PRELIGHT] = "#ffffff" # white
text[PRELIGHT] = "#ffffff" # white
bg[PRELIGHT] = "#000000" # black
}
style "clearlooks-menu-itembar" = "clearlooks-default"
{
xthickness = 3
ythickness = 3
}
style "clearlooks-tree" = "clearlooks-default"
{
xthickness = 2
ythickness = 2
}
style "clearlooks-frame-title" = "clearlooks-default"
{
fg[NORMAL] = "#2a2a2a" # grey
}
style "clearlooks-tooltips" = "clearlooks-default"
{
xthickness = 4
ythickness = 4
bg[NORMAL] = "#ffffff" # white
}
style "clearlooks-progressbar" = "clearlooks-default"
{
xthickness = 1
ythickness = 1
fg[PRELIGHT] = "#ffffff" # white
}
style "clearlooks-combo" = "clearlooks-default"
{
xthickness = 2
ythickness = 3
}
# widget styles
class "GtkWidget" style "clearlooks-default"
class "GtkButton" style "clearlooks-button"
class "GtkCombo" style "clearlooks-button"
class "GtkRange" style "clearlooks-wide"
class "GtkFrame" style "clearlooks-wide"
class "GtkMenu" style "clearlooks-menu"
class "GtkEntry" style "clearlooks-button"
class "GtkMenuItem" style "clearlooks-menu-item"
class "GtkStatusbar" style "clearlooks-wide"
class "GtkNotebook" style "clearlooks-notebook"
class "GtkProgressBar" style "clearlooks-progressbar"
class "GtkCheckButton" style "clearlooks-check"
class "GtkRadioButton" style "clearlooks-check"
widget_class "*MenuItem.*" style "clearlooks-menu-item"
# combobox stuff
widget_class "*.GtkComboBox.GtkButton" style "clearlooks-combo"
widget_class "*.GtkCombo.GtkButton" style "clearlooks-combo"
# tooltips stuff
widget_class "*.tooltips.*.GtkToggleButton" style "clearlooks-tasklist"
widget "gtk-tooltips" style "clearlooks-tooltips"
# treeview stuff
widget_class "*.GtkTreeView.GtkButton" style "clearlooks-tree"
widget_class "*.GtkCTree.GtkButton" style "clearlooks-tree"
widget_class "*.GtkList.GtkButton" style "clearlooks-tree"
widget_class "*.GtkCList.GtkButton" style "clearlooks-tree"
widget_class "*.GtkFrame.GtkLabel" style "clearlooks-frame-title"
# notebook stuff
widget_class "*.GtkNotebook.*.GtkEventBox" style "clearlooks-notebook"
widget_class "*.GtkNotebook.*.GtkViewport" style "clearlooks-notebook"
The second depends on the ubuntu-looks engine:

# Xedgy-Human theme for Xubuntu
# Based on Ubuntu Human Colorscheme
# Created by Peter Durrill.
style "clearlooks-default"
{
GtkButton ::default_border = { 0, 0, 0, 0 }
GtkRange ::trough_border = 0
GtkPaned ::handle_size = 6
GtkRange ::slider_width = 15
GtkRange ::stepper_size = 15
GtkScrollbar ::min_slider_length = 35
GtkCheckButton ::indicator_size = 14
GtkMenuBar ::internal-padding = 0
GtkTreeView ::expander_size = 14
GtkExpander ::expander_size = 16
GtkScale ::slider-length = 31
# GtkToolbar ::button-relief = GTK_RELIEF_NORMAL
# GtkMenuBar ::shadow-type = GTK_SHADOW_OUT
# GtkScrollbar ::has-secondary-forward-stepper = 1
# GtkScrollbar ::has-secondary-backward-stepper = 1
GtkButton ::child-displacement-x = 0
GtkButton ::child-displacement-y = 0
xthickness = 1
ythickness = 1
GtkTreeView::odd_row_color = "#ffffff"
GtkTreeView::even_row_color = "#f0f0f0"
fg[NORMAL] = "#101010"
fg[PRELIGHT] = "#000000"
fg[ACTIVE] = "#000000"
fg[SELECTED] = "#ffffff"
fg[INSENSITIVE] = "#aaaaaa" # B3AFAB disabled widget text
bg[NORMAL] = "#f5f5f5" # efebe7 background
bg[PRELIGHT] = "#f5f5f5" # f5f3f0 ?
bg[ACTIVE] = "#ffffff" # E1D9D1 ?
bg[SELECTED] = "#f5f5f5" # D6722D ?
bg[INSENSITIVE] = "#f0f0f0" # EBE7E3 disabled widget backgrounds
base[NORMAL] = "#ffffff"
base[PRELIGHT] = "#ffffff"
base[ACTIVE] = "#ffffff" # E1D9D1
base[SELECTED] = "#52759f" # FFD799 highlights
base[INSENSITIVE] = "#f0f0f0" # EBE7E3 disabled entry widget background
text[NORMAL] = "#000000"
text[PRELIGHT] = "#000000"
text[ACTIVE] = "#000000"
text[SELECTED] = "#ffffff" # highlighted text
text[INSENSITIVE] = "#f5f5f5" # B3AFAB
engine "ubuntulooks"
{
menubarstyle = 2 # 0 = flat, 1 = sunken, 2 = flat gradient
menuitemstyle = 1 # 0 = flat, 1 = 3d-ish (gradient), 2 = 3d-ish (button)
listviewitemstyle = 1 # 0 = flat, 1 = 3d-ish (gradient)
progressbarstyle = 1 # 0 = candy bar, 1 = fancy candy bar, 2 = flat
animation = FALSE
}
}
# Evolution (and some deprecated widgets) use bg and fg for its listview instead of
# base and text like they should, so we override it.
style "evolution-hack" = "clearlooks-default"
{
bg[ACTIVE] = "#f5f5f5" # E1D9D1
bg[SELECTED] = "#52759f" # FFD799 gtk combo highlight
fg[ACTIVE] = "#000000"
fg[SELECTED] = "#ffffff" # 000000 gtk combo highlight text
}
# Bright orange highlights only for selected widgets
style "clearlooks-orange" = "clearlooks-default"
{
bg[SELECTED] = "#52759f" # FF6D0C
}
style "clearlooks-wide" = "clearlooks-default"
{
xthickness = 2
ythickness = 2
}
style "clearlooks-wide-orange" = "clearlooks-wide"
{
bg[SELECTED] = "#52759f" # FF6D0C
}
style "clearlooks-wider" = "clearlooks-default"
{
xthickness = 3
ythickness = 3
}
style "clearlooks-wider-orange" = "clearlooks-wider"
{
bg[SELECTED] = "#52759f" # FF6D0C
}
style "clearlooks-button" = "clearlooks-wider-orange"
{
bg[PRELIGHT] = "#efefef" # button prelight
bg[ACTIVE] = "#e5e5e5" # pressed button
}
style "clearlooks-notebook" = "clearlooks-wide-orange"
{
bg[NORMAL] = "#f5f5f5" # efebe5
bg[ACTIVE] = "#f5f5f5" # d0c8c1
bg[INSENSITIVE] = "#f5f5f5" # efebe5
}
style "clearlooks-tasklist" = "clearlooks-default"
{
xthickness = 5
ythickness = 3
}
style "clearlooks-menu" = "clearlooks-default"
{
xthickness = 2
ythickness = 1
bg[NORMAL] = "#f5f5f5" # f8f5f2 menu background
}
style "clearlooks-menubar-item" = "clearlooks-button"
{
fg[PRELIGHT] = "#000000"
}
style "clearlooks-menu-item" = "clearlooks-default"
{
xthickness = 2
ythickness = 3
bg[SELECTED] = "#52759f" # FFD799 menu highlights
fg[PRELIGHT] = "#ffffff" # 000000 highlited menu text
text[PRELIGHT] = "#000000"
}
style "clearlooks-tree" = "clearlooks-wide"
{
}
style "clearlooks-frame-title" = "clearlooks-default"
{
fg[NORMAL] = "#404040"
}
style "clearlooks-tooltips" = "clearlooks-default"
{
xthickness = 4
ythickness = 4
bg[NORMAL] = { 1.0,1.0,1.0 }
}
style "clearlooks-progressbar" = "clearlooks-wide-orange"
{
xthickness = 2
ythickness = 2
fg[PRELIGHT] = "#ffffff"
}
style "clearlooks-combo" = "clearlooks-button"
{
}
style "clearlooks-check" = "clearlooks-button"
{
}
style "clearlooks-range" = "clearlooks-wide-orange"
{
}
style "metacity-frame" = "clearlooks-default"
{
bg[SELECTED] = "#52759f" # CC863E
}
style "extra-view-widgets" = "clearlooks-default"
{
bg[NORMAL] = "#f5f5f5" # F5C07F
}
# widget styles
class "GtkWidget" style "clearlooks-default"
class "GtkButton" style "clearlooks-button"
class "GtkCombo" style "clearlooks-button"
class "GtkRange" style "clearlooks-range"
class "GtkFrame" style "clearlooks-wide"
class "GtkMenu" style "clearlooks-menu"
class "GtkEntry" style "clearlooks-wider-orange"
class "GtkMenuItem" style "clearlooks-menu-item"
class "GtkNotebook" style "clearlooks-notebook"
class "GtkProgressBar" style "clearlooks-progressbar"
class "MetaFrames" style "metacity-frame"
class "GtkWindow" style "metacity-frame"
class "GtkCheckButton" style "clearlooks-check"
class "GtkRadioButton" style "clearlooks-check"
widget_class "*MenuItem.*" style "clearlooks-menu-item"
widget_class "*MenuItem.*ProgressBar*" style "clearlooks-default"
# combobox stuff
widget_class "*.GtkComboBox.GtkButton" style "clearlooks-combo"
widget_class "*.GtkCombo.GtkButton" style "clearlooks-combo"
# tooltips stuff
widget_class "*.tooltips.*.GtkToggleButton" style "clearlooks-tasklist"
widget "gtk-tooltips" style "clearlooks-tooltips"
# treeview stuff
widget_class "*.GtkTreeView.GtkButton" style "clearlooks-tree"
widget_class "*.GtkCTree.GtkButton" style "clearlooks-tree"
widget_class "*.GtkList.GtkButton" style "clearlooks-tree"
widget_class "*.GtkCList.GtkButton" style "clearlooks-tree"
widget_class "*.GtkFrame.GtkLabel" style "clearlooks-frame-title"
# notebook stuff
widget_class "*.GtkNotebook.*.GtkEventBox" style "clearlooks-notebook"
widget_class "*.GtkNotebook.*.GtkViewport" style "clearlooks-notebook"
# these should really use base and text colors instead
widget_class "*GtkCTree*" style "evolution-hack"
widget_class "*GtkList*" style "evolution-hack"
widget_class "*GtkCList*" style "evolution-hack"
widget_class "*.ETree.*" style "evolution-hack"
widget "*.nautilus-extra-view-widget" style:highest "extra-view-widgets"
unfortunatly, either I got them on the wiki too late, or they just weren't liked. But here they are for the rest of us.