This is who is playing and where:

More have been added, but the official Live 8 site currently lists:

Hyde Park, London:
* 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
* UB40
* Velvet Revolver

Palais de Versailles, Paris
* Andrea Bocelli with the Philarmonie der Nationen
* Axelle Red
* Calogero
* Cerrone / Nile Rogers
* Craig David
* Cure, The
* Diam's
* Dido
* Disiz La Peste
* Faudel
* Florent Pagny
* Johnny Hallyday
* Kool Shen
* Kyo
* Louis Bertignac
* Muse
* Placebo
* Shakira
* Sheryl Crow
* Tina Arena
* Yannick Noah
* Youssou N'Dour

Siegessäule, Berlin
* A-ha
* Audioslave
* Bap
* Brian Wilson
* Chris de Burgh
* Crosby Stills & Nash
* Die Toten Hosen
* Faithless
* Green Day
* Herbert Groenemeyer
* Joana Zimmer
* Juan Diego Florez
* Juli
* Katherine Jenkins
* Reamonn
* Renee Olstead
* Roxy Music
* Sasha
* Silbermond
* Soehne Mannheims
* Wir Sind Helden

Circus Maximus, Rome
* Antonello Venditti
* Articolo 31
* Biagio Antonacci
* Faith Hill
* Francesco Renga
* Gemelli Diversi
* Irene Grandi
* Jovanotti
* Laura Pausini
* Le Vibrazioni
* Max Pezzali
* Negramaro
* Nek
* Noa
* Tim McGraw
* Tiromancino

Museum of Art, Philadelphia
* Will Smith
* Bon Jovi
* Dave Matthews Band
* Destiny's Child
* Jay-Z
* Kaiser Chiefs
* Keith Urban
* Linkin Park
* Maroon 5
* P Diddy
* Rob Thomas
* Sarah McLachlan
* Stevie Wonder

Park Place, Barrie
* African Guitar Summit
* Barenaked Ladies
* Blue Rodeo
* Bruce Cockburn
* Bryan Adams
* The Bachman Cummings Band
* Deep Purple
* DobaCaracol featuring Kna'an
* Gordon Lightfoot
* Great Big Sea
* Jann Arden
* Les Trois Accords
* Motley Crue
* Our Lady Peace
* Sam Roberts
* Simple Plan
* Tegan & Sara
* The Tragically Hip
* Tom Cochrane

Makuhari Messe, Tokyo
* Bjork
* Def Tech
* Dreams Come True
* Good Charlotte
* McFly
* Rize

Mary Fitzgerald Square, Newtown, Johannesburg
* 4Peace Ensemble
* Jabu Khanyile and Bayete
* Lindiwe
* Lucky Dube
* Mahotella Queens
* Malaika
* Orchestre Baobab
* Oumou Sengare
* Zola

Red Square, Moscow
* Bravo
* B-2
* Moral Code X
* Spleen
* Valery Sutkin

So, so, so, so, so, so, so, so good.