I like seeing VF Roost posts pop up on FB with the rest of my notifications; whereas, I’d need to make an effort to check another location if it’s moved. That said, you’re sure to get much more activity by allowing non-FB VFers access that you’d lose by me not using it.
Having someone create a FB account (and using it just for VF Roost) is probably comparable to having we FB people look in a different location for it. I’m not discounting people’s aversion to having a FB account, but creating one, making it totally private and using it just for VF Roost is a really simple thing to do.
And after that long diatribe, I rarely use VF Roost so I probably shouldn’t have even commented.