The old site is non recoverable :-[, the database must have been corrupted for a while, since the backups from last year displayed the same symptoms.
I made three myself recently and they were all the same.
Anyway, this site is up as a placeholder (thrown up in half an hour) so that the few who still use the site can understand what's happened.
I've used SMF since it's simple and lightweight.
You can join up again (old accounts were part of the old DB...and possibly also part of the problem, given most of the few left on it were from old spambots).
Saw an article about Slack, so a group on there might be a idea for moving forward.
Wooster.