bb-NoSpamUser is ready! It’s a very simple plugin, with less code than the WordPress version. Unfortunately for all of the non-up-to-date hosts out there, it requires PHP5, but if somebody could port it to PHP4, I’d be glad to include the code.
The logic is simple: When somebody goes to the registration page — either the one where you enter information or the one where the account is created — their IP address is checked with StopForumSpam.com. When somebody tries to register, it checks their email address and username. That’s all it does. It’s that simple.