While catching up on some friends' blogs (something I haven't had time for in quite a while!) I came across an indirect link to this site: http://explodingdog.com/ .. boy, this thing is fun, addicting, cute, and even genius! (the cynical side of me wants to add the disclaimer that I'm not sure it's entirely clean just yet, but I haven't seen anything to give me reason to believe it's not.)

Enjoy. :)