I picked up Mario Kart for the Nintendo DS at EB today. I got there just in time, the guy told me they just got it about 20 minutes ago and I was the first person to purchase one. I couldn't ask for better timing (other than receiving it early). Anyways, the game is freaking awesome. I knew the game would include tracks from previous versions of the game, but I didn't know it had the ones that I liked the most (Moo Moo Farm from N64, original Mario Circuit from SNES, etc.)

I really haven't played single player all that much, I've been playing multiplayer on the 'Nintendo WFC'. The setup for the wireless online is pretty painless, it did take me a few minutes because the server was "Experiencing Intermittent Problems," but that is pretty understandable since the game doesn't "officially" hit most stores until tomorrow, Wednesday 11/16/05, and they are still ironing things out. When entering multiplayer you select if you want to play people from your region, worldwide, rivals and friends. I usually play worldwide or rivals.

I will have a more in-depth review soon about the game in a few days. But as far as you're concerned, if you own a DS, you MUST buy this game.

EDIT: Oh, you should check out NintendoWifi.com, from there you can link your Nintendo.com account to your DS and it lets you see how many races you have won and how you compare to others. Neat stuff. Definitely check it out.