From Kotaku, I found this hilarious post about the preorder bonus for putting cash down for either the Wii or DS versions of Sonic Colors coming this fall.
Personally, I can see Sonic fans possibly frothing at the mouth for this sort of thing… $49.99 for the Wii preorder and $34.99 for the DS preorder. Take a gander at it here: Gamestop – Sonic Colors Wii Version