http://airforce.togetherweserved.com/ looks to be a Facebook-esk place for Air Force personal to get together. It looks like it already has 50 2P0X1 individuals on it.
Some Other Ones
USATA
http://www.facebook.com/editprofile.php?sk=philosophy&success=1#!/groups/123850839950/
Calibration
http://www.facebook.com/editprofile.php?sk=philosophy&success=1#!/groups/2204837080/
http://www.facebook.com/editprofile.php?sk=philosophy&success=1#!/groups/81249463490/
As a Navy Vet, there are also some Navy facebook pages. Just remember that facebook is so "first-half-of-2011." Google+ is perhaps the new facebook. maybe. I'll have to look up some of the facebook pages for the Navy (this was actually an excuse to try out my new personal saying at the bottom of the post.