clay
+1y
He should look into reporting them to Icann, you have rights to the domain you owned if someone takes it from under you like that. There is a time limit on that though... like 30 days, I think, so he better get working. I may be able to help to be honest.. I've ran a ton of forums over the past decade.
EDIT: Also, if he can find the config file for the forum, he could just add the "g" in on the domain and the forum should just snap back to life.