G4TV: MotorStorm was one of the first games available on the PS3 and Sony is hoping to transport its newest racing franchises to the PSP. I got to play a few races on a demo track at Sony's Gamer's Day and it should provide a nice portable racing experience for fans of the series.
The gameplay is roughly the same as its next-gen counterpart. You'll race around tracks with multiple routes with vehicles of all types fighting for the lead, while using your boost just enough to avoid exploding. It's a good translation of the PS3's gameplay. This is portable MotorStorm.