[Zope-dev] Best way to do access logging?

I'm interested in doing some access logging for my Zope site -- a record that such and such an authenticated user accessed such and such a page. Anybody have an access log product already? Where is the best place to hook into the page serving process to grab the user name and URL when a page gets served? Any issues with storing the log in the ZODB? I can send it out to a SQL database if necessary, but would prefer to keep it within Zope (and more portable) unless there is a good reason not to. Thanks! Andrew