From the latest issue of qore: http://www.youtube.com/watch?v=T7SCmGPRvHc
I think there's meant to be a bit more, but it hasn't been uploaded onto Youtube yet. EDIT: Here it is.
Anyway, the game looks amazing. Even though I love kart racers with a passion, I was feeling a bit iffy about this after E3. It looked like it could be good, but I wasn't convinced.
Well, this video has single-handily convinced me. ModNation Racers is now one of my most anticipated games of 2010 (and given the competition, that's saying something). Can't wait.