Tired of the regulation grey bars at the top and bottom of your Gnome desktop and hankering after something a little cooler? Say something a little bit more like the dock in Apple's OSX? Then give AWN a run and get all the bouncing icons you can handle.
The Avant Window Navigator (AWN) is a Mac OSX-like dock that can be used to replace many of the standard menubars in Gnome. Installing AWN on Ubuntu is now relatively painless, although for other distributions you may need to build it yourself.