Google is likely central to the Internet portion of this effort. There's no doubt in my mind that Google has a fat contract with the Homeland Security Department. They can track your search behavior using cookies. Affiliates using cookies on adwords. Analyze the content of your weblog for dangerous phrases. Anonymity doesn't help. They have your IP address and therefore can get the records they need to put a name and a credit history next to your Internet behavior (all without a warrant).
John Robb's Weblog: Data Mining run Amok