I've been exploring the new-look forums and noticed something a little disconcerting under the "edit your profile" link. The "profile" information reads like a "click here for more spam" list, which is not at all coincidental with the ungodly amount of spam that began to enter my previously spam-free email account that I used to sign up here.
It may be too late for most of us, but I recommend
Spam Gourmet as a spam-removal (or at least minimising) measure. Follow their instructions and protect your email address(es).