There are several reviews out now, but check this one out.
http://www.gamebrink.com/nintendo-wi...ack=1&armies=7
It has a couple of videos embedded into it, the first one shows off a couple of the abilities Sonic can learn as he 'levels up' (Sonic RPG?), including one which slows down time so he can run through the blades of a fan.
I didn't know about the 'RPG elements', with the levelling up and stuff before then. I'm not planning to buy it anytime soon, and no stores here rent Wii games yet. I do know a friend of mine has been waiting for this, so I'll wait for him to get it. I've never been a Sonic fan, but I do want to play it. It seems quite interesting (and not a humanXhedgehog scene in sight)
Most of the comments I've seen for the game is that it is miles more fun than all of the 'Sonic Adventure' ripoffs of recent years.