Also yesterday, Public Knowledge and Free Press released a report on the controversial NebuAd technology that U.S. ISPs may be using already to track their customers across the web. Here's the News release from PK. From FP, here is the report NebuAd and Partner ISPs: Wiretapping, Forgery and Browser Hijacking. Here is a letter from privacy hawks and senior Energy and Committee members Ed Markey (D-MA) and Joe Barton (R-TX) to the head of the ISP Charter, asking, essentially, what was he thinking. From the joint release:

NebuAd uses special equipment that "monitors, intercepts and modifies the contents of Internet packets" as consumers go online...."NebuAd commandeers users' Web browsers" to load tracking cookies and collects information from users in order to place ads from ISPs.