One can’t blog enough about this subject. Lawyers, and others (and especially parents!), need to know about Web 2.0. You really, really, really do.
If you are tech-inclined, but just don’t have a lot of time, use the 23 Things method for learning about Web 2.0.
If you are not tech-inclined (and that is most of us), Robert Ambrogi has an excellent series of articles for lawyers that you can get to from his recent Web 2.0 post. Read them, follow the links, and experiment. Don’t worry about getting frustrated the first time through. It can take time for most of us to grasp (or grok, if you will 🙂 all of this.