Jesse,

>>When you say it's "possible" that it will meet my
>>requirements, is there any particular flaw or
>>drawback that you're aware of which make you think
>>it won't?

I was not quite sure of your exact requirements
when you mentioned popups/unders but I think you
mean tracking the path from a link contained in a
popup/under. Is that right ?

If so then recording HITS to a site from a
popup/under or an optin or a ppc keyword (which
are the examples you give) is a basic function of
any ad tracker, so the source is not a problem.

ClickAlyzer (also known as NitroStats) is an
advanced tracker which will monitor the visitor
path throughout your whole site, and even off of
your site on to an affiliate site. The only
problem I am aware of is that currently it comes
unstuck at a ClickBank order page.

Harvey