Singularity Sky
I am the Eschaton. I am not your God.
I am descended from you, and exist in your future.
Thou shalt not violate causality within my historic light cone. Or else.
I am in the midst of preparing a special surprise for MIX 2010, but I did get a chance to finish Singularity Sky (in which you can find the above quote).
I don’t have time for an in-depth review, but I do plan on reading the sequel when I get a chance. Net: according to my rating system, this book is a fair trade.