With all the recent attention focused on stories of teenagers charged with distributing child pornography for taking sexually suggestive pictures of themselves, jobs lost due to Facebook and MySpace entries, and libel suits over blog posts, people are justifiably concerned about the permanence of material posted to the Internet. Many a teacher or parent has had to carefully explain to children or teens that whatever they post online might be seen by people other than the intended audience, and might be out there for a very long time.