At any rate, .org really is the closest there is to any vestigial Prosper community, such as it (and .org) are. Even it is fragmented and fading... There really isn't much to get excited about anymore.
Meh...if you peruse down to off-topic there's the die-hards there that seem to be a community, though that is mostly a bunch of people bludgeoning each other on the head until something intelligent comes out, but I think we enjoy life there so it won't go away. I don't think Prospers.org is in immediate danger of dying, but there is no large community of Prosper cheerleaders anymore certainly.