I've only used IM with our exchange student - I haven't tried it with other audiences. The Twitter concept is interesting, of course I don't always have an audience to use it with. Finding the right trial audience will be my test. I liked the Twitter for Adademia article - there were lots of possibilties there that helped me see the uses. I would need to identify a group that I could use - maybe a group of 4-H leaders or youth...finding the right "fit" will be the next step. I like continuing to learn and having done these "lessons" has helped to push me to think about uses of ways of using technology.