As I said in my mails I don't think mirroring is possible without a script running on the server continiously OR by posting each post twice...

I think you could make a duplicate of this forum on another server and make the index.htm link to this one, but when the site is down update the db on the other server change the index.htm to link to the other site. That way the forum would be accessable... I don't know if a readonly forum is enough, ppl mostly want to post too