But another interesting thing to me is the fluid nature of conversations. Just as in a face to face conversation, where all of a sudden you may stop and say "how did we get on this topic" because an interesting trail of connections has been followed, I see the same thing happening on line. Message boards where the initial post sparks side conversations or new trails and connections.
Speaking of talking and conversations, there is Conversation Cafe, which organizes hosted conversations at coffee shops in the US (unfortunately none in my area). Of course maybe there is a comment on our life in the US that we need someone to organize a conversation...?