> lbrandy has it right here. If your definition of
> "tracking" is "web server log analysis," then nearly every
> web site you visit is tracking you.
Of course. The "problem" is that the FB widget is all over the web, giving them the the possibility to track users not only on a single page, but on (almost) the whole web. I put "problem" in quotes because it's only really a problem if users don't know that. And I think the vast majority of FB users don't know that FB knows almost every page they visit on the web. The same is true for google as well of course.