I absolutely LOVE Accelerando. I've recommended it to everyone I meet for years.
If you're looking for other great sci-fi reads:
John Ringo - Live free or die
John Varley - Titan (-> Wizard / Demon)
Charles Stross - Singularity Sky
Vernor Vinge - A Fire Upon the Deep / A Deepness in the Sky
Robert Heinlein - Stranger in a Strange Land
Dan Simmons - Hyperion
Alastair Reynolds - Revelation Space / The Prefect
Orson Scott Card - Enders game
Isaac Asimov - Foundation