Everyone's been playing around with the recently-released creature maker for EA's Spore. Even the developers at Infinite Interactive, most famous for the casual/hardcore title Puzzle Quest, have been funnelling their talents into crafting weird and amazing beasts. I2's Aaron Styles sent me a link to the studio's forums, where you can check out its wacky/cute/bizarre creations.
Before you ask, no, nothing looks like a penis. The Wormageddon gets close though.
I2's Spore Creatures [Infinite Interactive, thanks Aaron]