I will frankly admit that facebook is not one of my fortes (I haven't posted anything on mine in a month or two). For me it is mostly a waste of time to be on there. For OurBeacon however, it has the potential for serious exposure. In other words, there's really no way to know for sure what sort of effect being on there will have. But as Firasat has said, exposure is always good, though I also agree that there's the potential for a negative response. A social outlet can be a blessing for getting a message out, but it can also be a magnet for those who only want to dole out criticism.
My humble suggestion is that it is worth trying and the way we can start very simply is by asking all sincere students of OurBeacon to simply click "Like" on the OurBeacon page:
As others pointed out, every time someone likes the page, it will show up on all their friends' Facebook as well. And if their friends "Like" the OurBeacon page as well, then it will show up on *their* friends page, etc. And they say there are only six-degrees of separation...actually on Facebook, the reach of which is now pretty much global, there are apparently only 3.74 degrees of separation:
There are on average 3.74 degrees of separation between any one Facebook user and another, a study suggests.
The number of degrees represents the number of people in a friendship chain, excluding the people at either end.
Or, as the authors put it: "When considering another person in the world, a friend of your friend knows a friend of their friend."
- Excerpt from http://www.guardian.co.uk/commentisfree/2011/nov/23/facebook-degrees-of-separation
If nothing else, it will give us a "head-count" on how many of us are out there (I'm sure there are more than just 65 people that visit and appreciate the OurBeacon forum). But at its extreme, it has the potential to reach a tipping-point.
As for your other questions, I'm not sure who started the "OurBeacon" page on facebook, but depending on how it's setup, the way it normally works is whenever anyone posts a message on the page, the person who created the page will get an email letting them know. And I have read that it's possible to reply to these Facebook messages directly by replying to the emails.
And I don't know whether the page itself can be of help to people, but any added flow of traffic to the OurBeacon website and QXP could certainly help.
I hope that helps!