All the kids have blogs, and I was suggesting to my brother today that he monitor his 14 yr old daughter's blog. I guess you have to buy software to do that. Glenn Beck was talking about it today.
My friend's 15-year-old mentally retarded niece had such software installed...but was able to bypass it by getting help from friends at school. (For example, she started launching the browser a different way that wasn't recognized by the software installation.) Each time the protection was changed and improved, she'd "find" (read, "be told") another way to bypass it.
So if you install this software, don't just assume it's working. For example, try using a search tool (in Windows, go to START, then Search, and be sure to set it to search within files, not just filenames) occasioinally to see if you find inappropriate words on the hard drive, etc.