mark++

Wikipedia is a great source of beautiful desktop backgrounds. There are hundreds of high-res pictures, all IP-unencumbered in one way or another.

Check ‘em out: normal, widescreen.

I recently whipped up some scripts to grab the entire set of widescreen images and told OSX to randomly choose one every 30 minutes.

Update 9/08:
Apparently moved here: normal, widescreen.