Although the IP address can shift intra-session at the large ISPs, I was thinking that I could use cookies and IPs to track static pages as well.

Thus for example, if someone comes to the main page, a cookie is set and the IP address and cookie are stored in a DB table. When the user jumps to another page, if the IP changes (ala AOL), the cookie remains the same and that IP is also recorded along with the cookie. Thus. I could write a log analysising program that would let me track how long a user spent on a particular page as well as the path they took since I would now have a way to link users across IPs.

Obviously, it wouldn't work perfectly for all entries in the log, but probably well enough. Additionally, if the user is registered to a cookie and IP and then views a static .html page, I could still capture that path and time spent before moving off to the next request.

This must be similar to how those large web analysising companies are able to aggregate data about how much time is spent on a particular page and the pathes that users took.
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Filmo the Klown