List with free page rank forums (dofollow) PR7

http://www.microsoft.com/communities/forums/default.mspx
http://www.gamespot.com/forums/index.html
http://www.bungie.net/Forums/default.aspx
http://forums.photobucket.com/
http://forums.mysql.com/
http://forums.cnet.com/
http://forums.adobe.com/index.jspa