Chatting online is different than on the phone... it can take less concentration, for one thing -- you can multi-task and if one of you goes silent for fifteen minutes (to go prop up the Golden Gate Bridge, for instance) it's not usually a big deal. And it's easier to keep track of multiple conversations when you can scroll up to remind yourself of who said what. I could see them having MSN/AIM open and just jotting short comments to each other from time to time. I know sometimes I like to have IRC open just to have a sense of company there, whether we actually talk much or not.
Sheila, I think typing speed is a factor here; I'd assume Lois is a pretty speedy typist and we know Clark is
This could be fun.
PJ
