WebProNews

I wrote something that looks at the server variables when a user comes on to the page. I look at IP address and UA string. IP addresses will most of the time be unique, except in the case of AOLers and others of their kin, and even with those, one can still differentiate based on IP+UA string.

Cookies are bad not only because people clear them, but some people have their browsers not accept them at all, based on their privacy settings.

It's actually a crap shoot, but I almost never depend on cookies.