I suffered what appeared to be a catastrophic attack, such that the domain was suspended.
Due to being tied up with work-related matters, I was not able to get things back quickly, but it appears that we are back in business.
I had to nuke my old WordPress install and do a new one. I also nuked the user table. This was a necessary evil, but still evil.
Some of you–who had user accounts–will probably need new accounts. I will create them in the coming days.