Does your IP address betray you to data-harvesters?

In today's world of hackers, stalkers, and cybercriminals, not to mention government spy programs and commercial sites that collect information about you for advertising purposes, is there a way to surf the Web and keep your privacy intact? Or does that mere fact that you have an IP address mean that your identity is out there for the taking? Turns out, there's no easy answer to this question. (Watch the slideshow version.) Legally, an IP address does not constitute personal identifiable informa...