Evan Merritt is my son and he's 12 years old and owns his own blog.  He loves Xbox, so he is now blogging on his blog called XboxHandbook.com  He gets some pretty nice traffic and actually learned how to use the tool with the help videos that everyone has access to.  I'm amazed at how fast he picked it up without any help whatsoever except what is available on the help tab.  It really shows that if he can do it, then the publishing tool is a success for those do it yourselfers.  Check out his video game blog