I'm about to start googling but figured I'd start here. We already found a VB script that enumerates SharePoint site collections / sites. It calls stsadm to achieve this and it recursively evaluates each site to get the sub-sites.
I would like to know if we can modify that script to get the size (in bytes) of each site collection / site.
We're using MOSS 2007.
EDIT: I found a related question on SO but didn't see an answer for the disk space question.
You can see the total disk / db usage on the site settings page, not sure how to achieve this per site though, I think STSADM.exe -o enumsites -url htt://siteurl sites.txt exports an xml file with size included