Where can I find more puzzles like these on the web?

I enjoyed these Ricochet Robot puzzles on this page (you have to search for ‘Ricochet’ to find the exactly link), was curious if anybody had come across any similar puzzles anywhere?

http://www.ricochetrobot.com

Requires Java.

Oh cool, thanks! I never expected there to be an actual Ricochet Robot site elsewhere on the web.