Live 8 concert at london... What would I have not given to be there... Be it only for Pink Floyd...
But no there is not only Pink Floyd... To list a few:

African Children's Choir
Annie Lennox
Bob Geldof
Coldplay
Dido
Elton John
Joss Stone
Keane
Killers, The
Madonna
Mariah Carey
Ms. Dynamite
Paul McCartney
Pink Floyd
Razorlight
REM
Robbie Williams
Scissor Sisters
Snoop Dogg
Snow Patrol
Stereophonics
Sting
Travis
U2...

Live 8 will be organized in various major cities around the world to raise awarness on poverty and also to push world leaders do something.