Techland's 2010 off-road racing game Nail'd was a bit of a surprise in that it was actually a pretty ok game. Their new project, Mad Riders, seems like a safe bet for them considering that it's basically Nail'd... again.
You'll perform tricks throughout each race, use boost, and find awesome shortcuts on an obscene number of tracks both online and off. I'm not sure what else there is to say about another off-road racing game. This one is aiming for a Spring release on XBLA, PSN (SEN?), and PC.