martinibuster - 4:16 am on Nov 1, 2012 (gmt 0)
If you don't have a facebook page, start it and keep your members updated. A silver lining in that it will give you the opportunity to grow your social media presence.
Also put a note on your home page about it as well as some vague and general udpates that you are taking action to bring the forum back. Nothing specific, just a communication to keep members advised that you're working on bringing it back. I feel your pain and hope for the best for you.