Came upon this site, where you can do your own anaylsis to answer the above question. from the url, I believe that Prof Bernie Dodge has created it for a course which he delivers.
Access the page here.
The qualities looked for were:
external links, daily life accounts, non-standard English, images, political content, social content, technical content, emotion: positive, emotion: negative, humor, obscenity, extreme color use, music, school talk, positive self, negative self
And sites used for the studies were:
cat 1: teens
http://deadjournal.com/%7Epotterish/
http://www.livejournal.com/users/redundantagain/
http://www.xanga.com/home.aspx?user=Damare_Ichigo
http://alexdodge.net/
cat 2: teachers
http://teachingtechie.typepad.com/
http://missteacher.blogspot.com/
http://hipteacher.typepad.com/schoolblog/
http://www.beaconschool.org/%7Eclehmann/MT/