Some friends of mine introduced me to a cool site art.com's artPad feature last night.

You can draw your own digital paintings and submit them to the gallery, and you can also view others' submissions. One pretty interesting aspect to artPad is it captures the painting process and allows you to adjust the speed at which you're watching it being done. When a given painting comes up, hit "skip to beginning" to begin the replay.

It's a fun and quite addictive site.