It's fixed now. The database server needed to be smacked around a bit. I didn't know there was a problem until Matt called me at home. iHub has moved into an office, so I don't work from home anymore and this is one of the disadvantages.
I'm usually in a lot earlier than I was this morning, though, having waited around for the cleaning lady.
My apologies to all for the inconvenience. We seem to be running fine now.