Robots and Monsters
http://www.robotsandmonsters.org/faq.html

Joe Altiero, a SF-area artist, and his gf have started a website to raise money for their attempt at the SF AIDS Marathon. Here's the deal: You tell Joe whether you want a robot or monster, then give him some key words and $25 ($40 if you want a robot AND a monster -- seriously, there's something wrong with you), and Joe will send you a signed, original 6"x6" monster inspired by your suggestions. The money goes to the marathon.

What's not to like?