Wow. I'm actually speechless. Just wow.
My head is just running with ideas of what to create using these tools and...
I can't wait to get my hands on Spore now!
I'm sure I'm picking this demo up on the 17th and play around with the tools till the game actually releases.
I think I'm going to do some unoriginal stuff like...
Make a Starcraft Kerriganish, bipedal humanoid with extra blade arms.
A spider that looks sorta like the one from Evangelion.
Might as well make a Keroro and a Gloomy Bearish one in the process too!
Also make some hideous creature from hell type monstrosities! Woot!