does Projekt Revolution count? It's an almost biannual tour Linkin Park hosts, this year it's Linkin Park, My Chemical Romance, Taking Back Sunday, HIM, Placebo, Julien-K; and on the other stage it's Mindless Self Indulgence, Saosin, Styles of Beyond, The Bled and Medina Lake; the concert is usually more than 7 hours, last time I went (2004) it was Linkin Park, Korn, Snoop Dogg, The Used, Less Than Jake; Ghostface Killah, Funeral For A Friend, Downset, M.O.P, Helmet, No Warning, Instruction, Autopilot Off, and Mike V & The Rats; not all of the "Revolution Stage" (smaller bands) played at the same concerts, and I really didn't see that stage, because it went on until even after the main stage started