Everything of that seems great :) Except that there are leaderboards, but hey, 8th place won't disconnect, and there is little chance that any of you guys get owned by 8 people.
Too bad that there probably won't be splitscreen online :(
The problem here, is that the GC controller will probably be better to use than the wheel, which will make the wheel outdated in online.
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS