I agree, Lois and Clark would probably use the phone more -- and I'm biased, chatting all day long on the net.
But here's a different use: Random comments at work, things you don't want your coworkers to overhear. Okay, so maybe that would be more Cat's department, or Ralph's, but it can be interesting. Just yesterday at work, with my coworker I discussed where to eat for lunch and who to send (can't let everyone know, we can't do a food run for 12 people, but just the two of us and whomever goes is fine), comments about the stupidity of a coworker, the status of work after certain people's shift ended and it leaving us a little short, and a link to an online book site.