We're putting the final touches on a new extension for this message board that allows you to friend other users.
The intention is to help build community.
We would like to beta test this feature with a few users, so please drop a comment here if you'd like us to enable the functionality for you.
There's nothing yet that it does "more" than a tag, which we may show as a count or as a list on your profile. It does not notify the other user and it doesn't show you when they posted or did something else on BFFC, but we may expand to that kind of functionality down the road.
There is the ability to unfriend, too, which is also "quiet." This is likely going to stay that way.