I telecommute, and most of my day-to-day conversations go over IRC. My IRC client has ~50 open windows at the moment, but less than half of them are actual Open Source channels, many of them are direct queries with the user. And thanks to screen, I never log off and don't miss discussions, someone trying to get in touch, commit and release messages to -dev channels, and so on.

If it suits one's style, it's an easy and nice way to stay linked to one or more communities.