Well, I don't know next to nothing about VB or WMI programming. But I do know Perl and I have Samba (the package that lets Unix/Linux boxes act like Windows file servers). A quick search on cpan turned up a module that lets me drive the Samba client from within a Perl scrip. Retreiving disk space statistics is one of the basic functions the Samba client can perform.
A couple of hours of hacking later and SpaceCadet was born. It's running once a day through cron on my NMS box. It pleases my sense of guerilla justice that I'm now minding the health of a herd of Windows 2000 servers from my little Linux box.
Mark gets back tomorrow from a couple of days off ; hopefully he'll find this a welcome surprise.