311 played a 68 song 5+ hours show on 3/11 in new orleans (http://www.311music.com), that's ****ing insane.
They have been doing that a for a few years I believe, though last year I think the set was only 40-50 songs. I wouldn't drive that far (3 hours) by myself to see them and the only friend of mine that likes 311 has severe lung problems so a concert like that would be out of the question.
I don't remember how many songs they did at the 311-Day show in '02, but it was an amazing show. They timed everything out so that the performance would be exactly 4 hours and 20 minutes, and the last two songs of the night were "Hydroponics" and "Who's Got the Herb?"
That would be a sweet show and definitly worth the money.....but i think after like 40 songs it would get really annoying.