simra.net Doing stuff since 1973

http://www.ideashower.com/blog/block-facebook-beacon/

Beacon is part of Facebook's new ad system. It reports web sites that you visit back to facebook. And things you bought online. And trips you took, etc, etc. In the link above, Ideashower shows how to block Beacon altogether.

My first reaction to this system is that it's way over the top, but thinking about it further, I'm pretty sure google gets this info from its major adwords customers, too, only they don't tell you that they're sharing...