I managed to even get one for each letter!

• Marillion
• Genesis
• Andrew Bird
• Ani Difranco
• Anthony Phillips
• Au Revoir Simone
• The Beatles
• Beach Boys
• Billy Joel
• Björk
• Blackfield
• Bob Dylan
• Brian Eno
• Coldplay
• The Cure
• Daft Punk
• Dan Bryk
• David Bowie
• Death Cab for Cutie
• Django Haskins
• Erasure
• The Flaming Lips
• Frank Zappa
• Garbage
• Gogol Bordello
• h-Band
• Harry and the Potters
• Imogen Heap
• Jeff Buckley
• John Denver
• Johnny Cash
• Jonathan Coulton
• Keane
• The Kingsbury Manx
• Kino
• Klaus Nomi
• Kraftwerk
• Leonard Cohen
• The Mary Onettes
• Menomena
• Metric
• Miss Kittin
• Modest Mouse
• Nathan Asher and The Infantry
• The Never
• Nick Drake
• Of Montreal
• The Old Ceremony
• Old Springs Pike
• Peter Bjorn and John
• Peter Gabriel
• Porcupine Tree
• The Prayers and Tears of Arthur Digby Sellers
• Queen
• R.E.M.
• Radiohead
• Regina Spektor
• Roman Candle
• The Rosebuds
• Rufus Wainwright
• Sigur Rós
• Slowdive
• Stars
• Steve Hogarth
• Sufjan Stevens
• Tha Commissioners
• They Might Be Giants
• U2
• Vienna Teng
• Wanderlust
• XTC
• Young Galaxy
• The Zutons