I disagree with you:
an important part of modding work(if we can call it so…) is create an a community around it.
They should hire a PR guy and leave to him the community updates and other stuff…
Imagine how many ways there are to involve a community:
community contest.
multiplayer meetings.
screenshots contest.
…
facebook it’s a powerful tool to get people involved.
They should take inspiration by nmrih and cof:

If OBM and GD are at a similar quality level to BM and some of the community projects I’ve seen around here (like the one guy completing Surface Tension by himself, he’s awesome, you should try to get him on your team if you need any more people and he’s willing), then I know that I’ll be, as the G-Man would say, impressed.