Actually fitz, analytics does quite a bit more than that, and works independently of AdWords.
I'm not sure I want Google knowing everything about my sites, so I only have it running on a few low traffic ones.
@Raj, Fitz's right, there's usually no way to tie an IP address to an email account. That being said, if someone from Versa-Lok was visiting GTX via a connection that went through a Versa-Lok IP block, I could find that out (and often do

).
I think I'm going to edit the chicken.com address example. Don't want Google thinking we endorse that content.