We got hacked. The database is gone.
Seems it was through Postgres: http://london.pm.org/pipermail/london.pm/Week-of-Mon-20050905/033144.html
Unfortunately through what seems to have been a misunderstanding on my part we don't have a current backup. Bob has offered a database dump from February, and I am currently working on a bit of SOAP to use Google's API to retrieve all their cached copies of the site. A fair bit of work is going to be involved getting the site up and running again, and I can't promise it's going to be ready very soon.
Sorry.
Earle