for first pass at the concept, we could use keyboard chat. Each person pre-types a small introduction and sends it to the group in rotation. Would need a moderator to keep thing under control. We hams do this frequently on the various radio teletype modes. Takes a bit of getting used to, but would allow anyone, anywhere to join in.

Not sure what, if anything, it would accomplish though. We get the same effect here on the board without the limiting "be there at the same time" issue. Probably not woth the effort......