When I first set up my N800 I only had 2 contacts showing in Chat, only one of them got imported - the one set up as 'Always Show'. The second one never got imported. I then set it to Always Show and it was immediately imported. Later I had to go through the same procedure for other contacts: Everything I set to Always Show gets imported immediately. I don't think I have had any other contact imported automatically, although I think I've seen reports from others about it.