I've always struggled to find good websites with high quality images to use as backgrounds or generally just to look at.

Please post any good (free) links!

[lostinspace]

If you're into movies, try out:
http://www.impawards.com/
They have thousands of cinema posters and are great for using as wallpaper. I change mine regularly to tart the desktop up a bit.

[pRot3us]

www.customize.org

[Dazmeister]

http://www.xptheme.info/