Heard a lot anbout this when iit came out in hardback last year. Now in paperback, but almost put off by the "the next Da Vince Code" sticker on the cover. Amazon reviews are mixed (mind you they were for Singularity Sky too!)
Should have been put off! Very poor, and it's only the first part of a trilogy so it doesn't even get to a proper ending (or even I suppose the interesting stuff).