Sony will be doing a separate beta for LittleBigPlanet Karting on PS3, the publisher announced.
There's only one requirement... Yes, you need to own a PS3 to participate. The developers would also prefer testers who've played games from the ModNation Racers and/or LittleBigPlanet series before, but I don't think it's a dealbreaker.
Interested? You can sign up to join in right here.