Oh my. That game looks rather fun. I didn't think they'd make a racing version since there is already some racing in the game. But still looks playable. Seems to have more than just Mario Kart. I actually look forward to it coming out. I wonder if you get to design your own kart like you can do to the sac boy.
This looks really good! From the looks of it there will be so much content and stuff to tweak around with that it'll probably put Mario Kart 7's customisation options to shame. The graphics also look very smooth, which is a big plus for me. And the online mode looks crazy fun. It's most certainly something to look forward to. Much more diverse than Mod Nation.
Never played LittleBigPlanet, but this game looks really good on its own, definately one i'll consider getting!