okay - I'll have to hook up with the ftp client and see if I can find the wiki files anywhere on the server.
Although I've got a vague feeling they were hosted offsite somewhere.
(looks through forum copy on his computer)
got a wiki folder - but no database in it.
Looks like we installed the front end of the wiki on the forum and it either created a database that's gone awol or linked to an external server where the database has gone awol.
We did have database problems last year and I suppose it's possible that one of the ones the server people had an issue with was the wiki database.
I'll keep looking.