Over at
http://ds.ign.com they have a new developer interview on the near complete NFSU2DS. Pretty interesting. By the looks of it this could be the DS's best game so far apart from Mario.
The graphics look nice (no videos available though), the dev. says they are proud to have it at a constant 60 fps, and they say that the vehicle physics and gameplay is very close to the console version. Also he says that you can do "anything" with the decal drawing tool, and the touch pad nitrous controls actually look useful, unlike that other crap on the second screen in current DS racers.
All that's old news though, the cool new thing he mentioned, is that the DS version will have an exclusive new game mode (i forget what it's called). He says they worked hard to make this game mode take full advantage of the DS's second screen. He won't say much about it, other than it employs an important GPS tool on the bottom screen and that the gameplay has something to do with managing turf wars and simultaneously getting the best times, or something like that.
Also he says it supports 4 player multiplayer in all game modes, and features stat tracking. (i'm guessing every player needs their own cart, although it's not mentioned).
Looks cool...