Interfacelift.com : The Wallpaper Site

Well this site is nothing less than what its name suggests. The ultimate source for GUI enhancements for Mac OS X, Microsoft Windows, and Linux. They have a huge collection of icons, themes and wallpapers which gets updated almost every day. All the content is submitted by its users.

The wallpapers are available in following resolutions:- 2560x1600 1920x1200 1680x1050 1440x900 1280x800 1600x1200 1400x1050 1280x1024 1280x960 1024x768 apple ipod / iPhone sony psp.

Sample Wallpapers:

Take a peek at the site