Spore, release date announced

[RTM]

I wonder if this game is moddable?

Maybe? I wasn't into many of the previous Maxis games (aside from The Sims), but I don't recall a lot of user-created mods being available for them aside from extra content such as buildings, wallpapers, etc. Nothing that altered the gameplay mechanics to any huge extent.

My guess is that they deliberately "dumbed down" some of the stages to leave themselves room for lots of expansion packs.