Joost is using March Madness 2008 to do a large-scale test of live P2P video streaming. I just loaded it up, and I have to say that I’m pretty impressed. I put the feed next to the same game on CableTV, and Joost was only about 5 seconds behind. The resolution wasn’t much compared to even analog cable, but it was certainly good enough to follow the game. You can see a screenshot of the two to the right, Joost is on the left and CableTV is on the right.