[Zope-dev] tracking user usage

A long time ago in a galaxy far, far, away, a Zopista said that I could easily track user's space utilization. Could someone point me to the hooks or wherever else I need to go to implement something like this? Specifically, I just need to track how big the stuff in a SiteAccess folder gets. (of course, i have to cross-reference that with disk quotas, but that's another kettle of fish) ~ethan fremen (who wishes he could just #include another data.fs from the "parent" data.fs)