Please tell me I'm not the only one hyped for this.
According to this Spore website, a full version of the Creature Creator (not the actual game, mind you) is being released for $9.99 on June 17th. Released alongside it is a demo that contains 1/4 of the Creature parts. This supposed comes with the ability to share creations with friends, and a method for uploading directly to Youtube.
Creature Creator Demo here.
Platforms: PC, MAC, DS, WII (The Wii version is expected to be released sometime later)
Official Release Date: September 7th, 2008