The old forum is available under http://old.forum.mechlivinglegends.net.
It won't let you log in, it's merely for archiving purposes.
It'll be available until the old server shuts down (which is beyond my control). I'll request a backup of the db for a permanent archive, but no guarantees.
It appears the old server has finally shut down, and with it the forum archive. It won't be accessible anymore.
Not all is lost, as I have a (slightly outdated) backup of the database. But for now there's no way to access the archive.
except, maybe, for the records in the wayback machine