http://attblueroom.com/music/Bonnaroo-Music-and-Arts-Festival/live-webcast.php
I just learned about this today since I've been out of town, but I wish I had known sooner. Yonder Mountain String Band is playing now (but it's over after this song) and it was really good, but I don't know about the other bands coming up...there's only 4 more playing according to the schedule.
I went to Bonaroo in 06 and 07...bahh this years line up made me sick.
yeah it sucks it's going more mainstream. I'm definitely going to try and go next year though, just for the festival experience and that's probably the closest festival to me. I'm seeing Panic next month so that should be pretty fun in itself though.