Hi, I noticed that you mentioned adding graphs and charts, and just thought I would point out this module I saw on drupal.org the other day:

http://drupal.org/project/open_flash_chart_api

I haven't tried it out yet, but it looks cool...seems to provide the ability to add Google Analytics type charts pretty easily, though I don't know if there's a lot of overhead involved.

In any case, thanks for adding the reports!