The Greek Theatre is a fantastic outdoor LA venue. It's one of the rare venues where I seem to always have a great time. If you're on the fence about any of these bands, just buy the tickets.
Tickets are currently available through their Premier Club Membership program. You'll have to pay $12/ticket and you won't really know where the seats are going to be, but it's probably worth rolling the dice if you really want to see a show.
05/05/07: Celtic Woman
05/07/07: Keane / Rocco DeLuca
05/13/07: Modest Mouse
05/18/07: Harry Connick, Jr.
05/19/07: Stevie Nicks / Chris Isaak
05/20/07: Stevie Nicks / Chris Isaak
05/26/07: Hot 92 Jamz Hot Summer Nights w/ WAR
05/27/07: Hot 92 Jamz Hot Summer Nights w/ WAR
06/08/07: A Prairie Home Companion
06/09/07: The O’Jays / Johnny Gill / Keith Sweat
06/16/07: KBIG Disco Fever w/ Village People, etc.
06/17/07: The Goo Goo Dolls / Lifehouse
06/29/07: Allison Krauss and Union Station
06/30/07: Star Rocks the Greek w/ Cyndi Lauper / Erasure / Debbie Harry / Dresden Dolls
07/07/07: Chicago / America
07/18/07: The Fray / Gomez / Eisley
07/19/07: The Fray / Gomez / Eisley
07/20/07: Sonic Youth – A Special Performance of Daydream Nation
07/21/07: Hot 92 Jams Hot Summer Nights
07/22/07: Snow Patrol
07/23/07: Snow Patrol
07/26/07: Lyle Lovett / k.d. lang
07/27/07: Lynyrd Skynyrd
07/28/07: Bob Weir & Ratdog / Keller Williams
07/29/07: L.A. Jazz Festival
08/04/07: Clay Aiken
08/16/07: Tony Bennett
08/17/07: Los Lonely Boys
08/18/07: Hot 92 Jamz w/ George Clinton & P-Funk, Mary Jane Girls, etc.
08/22/07: Michael Buble
08/23/07: Michael Buble
08/24/07: Gipsy Kings
08/25/07: Gipsy Kings
08/26/07: UB40 / The English Beat
09/08/07: Vince Gill / Amy Grant
09/15/07: Rock en Espanol Festival
10/05/07: Twelve Girls Band
10/06/07: Steve Miller Band