Web-form for adding subdomains?

[pgentoo]

I think all you need to do to accomplish what you are trying, is to expose the logic on the add user page that you see as a reseller, to the outside world, of course locking down a few of the fields.

With this you could take a username, but tack on the rest to form teh domain. Then you'd get a domain like username.yourfreehostingdomain.com. As for all the other options, you could just have them hardcoded to only allow one ftp, 0 mailboxes, 1 database, etc. This really shouldn't be hard if i correctly understand what you're looking to do...