I'd been looking at disposable emails for a while and was really curious about them. Unfortunately there's not a whole lot I could find on writing a system for them or opensource systems. I eventually found Anoninbox (http://anoninbox.sourceforge.net) and thought that it'd be a great project for the XOOPS community to port over. It'd allow for smaller sites with wildcard email forwarding to provide all their users with an email account without actually setting up an account. While it's understood that disposable email systems typically don't allow for sending of mail, it wouldn't be too hard to add (i don't think?) using the sendmail features of php. I'm vaguely thinking there might be some security concerns with such a module, but I'm sure those could be worked out during porting.

*shrugs* Just a thought.