Best Live Album Ever...

I second Renaissance Live at Carnegie Hall, Little Feat Waiting for Columbus and Dire Straits Live Alchemy and add to those:
Pink Floyd-Delicate Sound of Thunder
Peter Gabriel-Plays Live

Bruce Hornsby Here Come the Nosiemakers
Tommy Emmanuel LiveOne
Robben Ford and the Blue Line The Authorized Bootleg
Jesse Winchester Live From Mountain Stage
Darrell Scott, Danny Thompson and Kenny Malone Live in NC
Rhonda Vincent and the Rage Ragin' Live
Steve Goodman The Easter Tapes
Steve Goodman Live Wire
Steve Goodman No Big Surprise
New Grass Revival Live

I almost forgot...
Tom Waits Nighthawks at the Diner

Van Morisson - It's Too Late To Stop Now! Best ever!!!!!!!!!

ABB Live at The Fillmore East!!!
Los Lonely Boys Live at The Fillmore is also a nice listen.