Having helped build, maintain, and run online communities for more than 10 years now, I fully agree that this is a good idea. I'd add, however, that such a job/title should be given to one of the admins along with a moderator or two as assistants, not an additional staff member dedicated to only the forums. It may mean that some staffers focus first on in server issues and some on forum support, but having them "cross-trained" and integrated into the staff structure fully is far better and flexible overall.