Networked PS2s
Last night Jamie and I went to Best Buy and got a 4-pin to 4-pin i.LINK cable so we could connect our two PlayStation2s together and play some networked GT3. He brought over his PS2 and TV, we linked up the PS2s, and we battled quite a few times. It was really great to be able to race full screen on your TV, talking smack to your opponent, all while knowing that other car on the track is a living human. Cool.

Evidently, it's possible to purchase an i.LINK hub and and have up to 6 players race against each other. Gotta try that sometime.