James Taylor (five times)
Bonnie Raitt
John Hiatt
Lou Reed
Leonard Cohen
Frank Zappa
Lindsay Buckingham
Little Village
NRBQ
George Benson
John Ambercrombie
Joe Pass
Charles Mingus
Leo Kottke
The Band (after Robbie Robertson left)
The Smithereens
Tom Petty
Dwight Twilley (I was the opening act)
the Guess Who (I was the opening act)
David Gilmore (I was the opening act)
Livingston Taylor
Arlo Guthrie
Jurassic Five
Neil Young (just last week!)
the Flaming Lips
Beck
Phoebe Snow
Dire Straits (three times)
Pat Metheny (five times)
Van Morrison (twice)
Brian Wilson doing Pet Sounds at the Hollywood Bowl
Squeeze
Mission of Burma
REM
Eagles/John Fogarty/Stevie Nicks
Fishbone
Laura Nyro
Joni Mitchell
Eric Andersen
Boston Symphony Orchestra
Los Angeles Philharmonic
Sydney Symphony
Honolulu Symphony
Gary Burton
Keith Jarrett
Billy Joel
Santana
Phish
Sonic Youth
probably more....
tonight, The Polyphonic Spree
http://www.thepolyphonicspree.com/main.html