As this BBC story explains, social networking is going mobile. This has interesting implications when you consider that people have their cell phones with them at all times. Expect less text and more graphics, video and audio as people find ways to update their profiles from bars, amassment parks or wherever they happen to be.
There are some interesting safety implications, of course, but also some very exciting opportunities. If you think MySpace made a stir, wait till Congress figures out that kids can blog from wherever they happen to be, usually far from adult supervision.