There are several long-distance and BMW Facebook pages. And even a K1200GT page. And one for Atlanta BMW riders. I have been a bit timid to explore any of those sites. As soon as I am more comfortable in Facebook, I will start posting to the more active pages. Check my profile (registration required) for more information. Look at the groups I have joined.
And I have set up a Facebook event for the Dream House 500, and published it.