The old forum will be frozen, but archived somehow. Some of the info (some sticky posts for example) will probably be transferred, but not all of the history.
If you mean a direct link from here to MusicBrainz, I don't think there is right now. It's not only a MusicBrainz forum, but for all the projects, but it might make sense to add all the small project logos on the footer or something for easy access to all projects? Not sure what the plan is though