I just downloaded this, along with its sequels, as part of a filling-up-my-ebook-reader megaupload. I just realized that I read it, years and years ago, and really did not like it. I remember it being pretty dumb, not very well written, and pandering to cheap fear-mongering.
It's got that very specific but hard-to-describe contemporary-thriller style that I particularly dislike.
Update - just to be sure, I flipped through a few pages to be sure I'm remembering the right book. Yup. And I'm going to update by statement above to "VERY badly written." Deleting.