I initially joined Facebook because a couple of friends from online groups had drifted away from the group and were using it pretty exclusively. I wanted to keep in touch with what they were doing so I joined too.
I added a few friends that I knew and checked it sporadically. Now several groups that I'm on have moved across to it or use it in addition to their other forum. So I check it most days, leave a comment or two if I feel like it and keep in touch that way.
Do you facebook? (Is it actually a verb??!) If you do, and you'd like to be friends ('do you want to play with me?' lol), I'm Kez Ptol on there. Let me know who you are when you add me. A word of warning though - if you send me any hugs, gifts, flowers, animals or request that I join groups or participate in silly status updates etc, don't be offended when I don't play along :)