If you haven't used screen yet, then you should really check it out. It's great for running those long jobs (or bittorrent, for legit purposes of course) and coming back to it at a later time. Anyway I always wished that I could share a screen session with another user. Well I should have read the man file because it is already there.

screen -x Attach to a not detached screen. (Multi display mode).

Now if they would just allow scrolling back through the history with .