I'm thinking this one may be the DS' first killer app, if Nintendo can pull off the single player game.
Granted the main purpose of the game is to show off DS multiplayer, but I don't know anybody else interested in the DS, so I think I might be going it solo for a while. The game itself controled fairly well, though I assume the thumbstrap, which wasn't attatched to the demo unit, will make the iffy quality of the aiming better.