Downloaded Google Talk, although can chat in my Gmail account. I haven't added a lot of contacts but created some, and sent one invitation to chat. Since I work on this on my weekends, it may be difficult to find someone online to chat with.

I have been using Twitter for a long time; it is a good way to keep up with what my daughters are doing, and they with me. Anything asynchronous but frequently updated is useful for comunicating with busy people. I also follow some interesting people and friends and Science Friday on NPR.