Here is a website where you can look at screen shots from people using LINUX, and different GUI's. And on the list is Ubuntu, Gentoo but i could find Yellow dog. So go threw pick your fav, Also, if you have screenshot of other LINUX Gui's there are not on the list, feel free to post those screenshots. also, Screenshots of LInux runnin on the PS3 can be posted aswell.
MAKE SURE YOU PUT THE NAME OF THE GUI you posted.
Also if you know a website where they post screenshot of Linux GUI's post the url. Thank you!!
The one below is Kubuntu!
Spoiler for LOOKY: