Metacity

[Steve Bergman]

Perhaps it was a poor implementation. Enlightenment?  Sawmill?  Can't 
remember which, I just remember a lot of bouncing back and forth and 
back and forth and back and forth between desktops without meaning to 
switch desktops at all.  As I recall, if you hit the right hand border 
it would kick you to the next window and if you did not imediately move 
the mouse to the right it would blink you back, and then if you did not 
immediately move the mouse to the left, it would kick you back to the 
right and and then you didn't know which way to move the mouse at any 
given instant and... and... and... Norman! Coordinate!

The switchdesk comment was a joke.  However,  KDE does have at least 
some of the features you are asking for.  I love the simplified Gnome 
2.4, but Meaticty could probably do with a few more features.  Always on 
top really would be nice at times.