"...they are living in one of the other six bunkers on the island."
I think they are in the same bunker, but on the other side of the concrete that Sayid and Jack couldn't find a way through or around. It looks like most of the important stuff is on Jack's side, so they don't have a clue to what's going on. And I don't mean right on the other side though. The bunkers look quite large. They still could be quite a distance away.
I read somewhere that it could be deep into the season before Mike, Sawyer, and Jun are reunited with the rest of their group, so I don't think we'll see the Rose/Bernard reunion any time soon. When it does happen though, I think that the "triangle" will be between Kate, Sawyer, and Anna. That would stir it up a bit.