Good news, it has been a few days, and the spam is gone. I got an app that automatically checks every new registers IP, Username, and E-mail against a database. If it is clean, it lets it through, if it couldn't check it for some reason (database down, whatever), or if it is rejected it places it up for admin approval. I've had a couple that I wasn't sure about, so let them through, so there may be some spam, but it should be mostly cleared up now.
Thank you for your patience!