I'm watching it as it goes on. Live speedruns are always entertaining, especially when they have to improvise. Mario Galaxy 2 was great, but the Halo run was kind of disappointing - he took donations to start on Legendary, then died 5 times in the second level and switched down a difficulty. Then he continued to die throughout the run, going for an hour and a half longer than planned (although some of the deaths were hilarious, like backing off cliffs). However, he openly admitted that he forgot to practice because he was focusing on the other runs, and the Portal run he did beforehand was amazing, so it's forgivable.
I'm mostly waiting for the races, since they're always really exciting. 6 hours of Metroid speedruns will be great too, though I'd probably just have it playing in the background while I do other things.
As a side note, 100% Chrono Trigger run is insane, especially single-segment with at least 1000 people. I wish him luck, and I hope he saves often.