I made a custom UI for openclipart via Stylish (only tested in Firefox WinXP at the moment). Check it out. http://tiny.cc/ud648. Features are: WIDESCREEN LAYOUT, STICKY SEARCH BOX, STICKY NAVBAR AND LOGIN, CENTRALISED SIDEBOX TITLES, SEMI FLUID LAYOUT, Good stuff.
And here's the link to this very nice Styligh tool.
https://addons.mozilla.org/en-US/firefox/addon/stylish/
