thanks. judging from the comments here already, i think a lower-priced restricted plan is needed. i'll work on that tonight...

for subdomains, a simple DNS wildcard is used to route (everything).corduroysite.com to the same ip. a wildcard SSL certificate is also needed, which is quite expensive unfortunately.

the application then checks the hostname that was passed from the web server, finds the matching company record, and does its magic.