Tracking PCs anywhere on the Net

Tracking PCs anywhere on the Net: ZDNet Australia: News: Security
This can be either good news or bad. A doctoral student at the University of California has demonstrated that you can identify any computer on the internet through its internal clock. This means an end to anonymous web surfing. On the one hand, it could make it easier to catch criminals on the net on the other hand, it could also be used to keep track of what you may be looking at from your own computer.