This is coming out for the PS3 and 360 on February 10, and for the Wii in March. It is a "Kart" type racing game, and seems to look like Sega's answer to Mario Kart. Not sure which version I will get. If the Wii version using the wheel that came with Mario Kart Wii, I'll get that one. Here's the confirmed character list:

From the Sonic the Hedgehog series

* Sonic the Hedgehog
* Miles "Tails" Prower
* Knuckles the Echidna
* Doctor Eggman
* Amy Rose
* Shadow the Hedgehog
* Big the Cat

From other Sega properties

* AiAi from Super Monkey Ball
* Amigo from Samba de Amigo
* Ryo Hazuki from Shenmue
* Beat from Jet Set Radio
* Alex Kidd from the Alex Kidd series
* Billy Hatcher from Billy Hatcher and the Giant Egg
* Zobio and Zobiko, the zombie couple from The House of the Dead EX

From non-Sega properties

* Banjo and Kazooie from Banjo-Kazooie(Xbox 360)
* Xbox 360 Avatars(Xbox 360)
* Miis (Wii)