Sharing your SSH commandline

I've been wondering if it might be interesting to see webcasts of just smart people coding some project from start to finish, say one hour webcast per day.

Two people typing into the same shell at the same time, both as root? I don't think this is a good idea.

I love screen. Still don't know half of what it can do.

Is there a way to do this without having to sudo on one or both ends?