Brilliant, gripping book for those who like clever thrillers. With a bit of social criticism thrown in.
That said, unlike some reviewers, I ain't totally convinced about the tech. The author avoids having to bring in a "full AI" (think HAL in 2001 Space Odyssey), mostly because full AI is much more scifi at this point than credible in a contemporary techno-thriller.
Yes, you could script fairly sophisticated behavior by responding to news events and the like.
But... as time went on and you diverged more and more from your initial starting point, the scripts would have more and more problems with their simple "if X happens, do Y".
Just because X may not have been foreseen.
Near the end of Daemon, I got the impression that the AI was, in fact, rather cleverer than presented at the beginning. Perhaps another layer of deception?