The reason I went to all the trouble with the network…
Mario Kart DS.
This game seriously rocks. The single-player experience is exactly what you would expect. The graphics are at least on par with the Nintendo 64, the frame rate is solid, sound is excellent. The drifting is a cross between MK64 and MK:DD, and you WILL need to drift if you want to do anything other than lose.
Where this game holds its promise is the multi-player. Not only does it do multi-player like MK:SC on the Game Boy Advance (only without wires), it does multi-player over the Internet. Up to 4 players. It took some doing to get it to run with my admittedly non-standard network here, but run it does. I’ve not seen any lag other than at the very start of the race (there’s a random delay before the countdown). Frame rate stays rock solid throughout online play. It allows you to have it pick your opponents regionally, world-wide, or from your “friend” and “enemy” lists.
Oh, and it seems to have every track from every Mario Kart game ever in there, at least for multi-player. This is, of course, VERY cool.
I’ll have more to report after I’ve had a chance to play the other multi-player (in person) modes. I’ll probably comment more on the internet play after I stop getting my ass handed to me as well.