Apr 16, 1994 - Pink Floyd
Summer 1994 - Saw Doctors, Joan Baez, Wolfstone
Nov 22, 1994 - They Might Be Giants (opening: Frank Black)
Dec 2, 1994 - Phish (Dave Matthews Band)
Jun 18, 1997 - U2 (Oasis)
Oct 14, 2003 - KISS, Aerosmith
Jun 11, 2009 - Cake
Jun 10, 2010 - OK Go
Oct 19, 2011 - Coldplay, Norah Jones (live via remote broadcast but this is my blog so I get to make the rules about what constitutes a "live" performance)
Nov 1, 2011 - Foo Fighters (Mariachi El Bronx, Cage the Elephant)
I love that there are set lists posted for most of these shows. Thank you, music nerds!
I left out the smaller bands that you've never heard of, mostly because I can't remember them. Of those above, the only one that I can really say "I saw them before they were huge!" is Dave Matthews Band. They were just starting to blow up in 1994 and weren't really a name-brand yet.