I know I've posted a majority of my collection in an older thread, but I'll bite again.
Off the top of my head in no particular order I'd say:
The Killers, The Postal Service, Mono, Dido, Morcheeba, Fischerspooner, Jem, Air, Hooverphonic, Olive, Lamb, Massive Attack, Imogen Heap, Autour de Lucie, Frou Frou, BT, Bjork, Gus Gus, Blue States, Superior, Thievery Corporation, Everything but the girl, Poe, Portishead, and The Shins.
That's all that I can think of off the top of my head. It's all good stuff.