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

I think Singularity Skies pales in comparison with the depth and breadth of Accelerando.

Ender's Game and Foundation are timeless classics, and I suspect, Accelerando will eventually become one.