I've heard about the Twitter phenomenon and have a few friends on Twitter, but for the most part, I don't get it. I'd like to think that it's because my age group isn't really into Twitter, though I fear (as I have since childhood) that it's because I'm just not cool enough.
In any case, I'm trying Twitter out because of Louise Fletcher's Blue Sky Resumes Blog. In a recent entry, she sings the praises of using Twitter in the job search. More importantly (for me), she explains what Twitter is and how it works. Check it out.