A couple months ago I started playing Trade Wars Rising due to a friend's facebook post from within the game. Something like that could work for BM.
Some of the basic ideas:
Battle Reports
Promotions (within army, within region, etc)
War Declarations
It wasn't automated in TW, there was a button beside messages that you could post if you wish, one for twitter/fb/etc.
cheers,
Scott
I think I might cry if I see "Share to facebook" on my message menu.
We used to have a facebook userbox, or whatever they were called.
*pukes*
The Facebook API kept changing all the time, which is why it wasn't maintained. I have better things to do than chasing a moving target on a site I don't even use very much.