thanks to RobertK (he seems to find the good stuff lately), i was pointed to this tool:
it seems like a cool little utility to get quick, concise information about your sharepoint environment in a one-stop shop place. it isn't web-based and i haven't done much testing around on it, but it does a good job giving you a snapshot.
since there isn't any screenshots on the site (you can download a free trial), i'm including one here (blacked out areas are there to protect the innocent ;-)).
Please enjoy some of these other recent posts...