Forums is the very important in the seo it well be developing the ranking the position .in below i have listed some of the forums site please check and verity forums.digitalpoint.com sitepoint.com r8.com.au webmasterforums.com allcoolforum.com warriorforum.com forums.webicy.com
http://www.seocombot http://www.warriorforum.com http://forums.digitalpoint.com http://www.sidetalkz.com http://www.forums.seochat.com http://www.talk.mania.com http://forums.tutorialized.com http://www.v7n.com http://seoforums.org http://forums.webconfs.com http://www.seocommunity.in http://www.forums.seochat.com http://www.forums.seo.com http://www.www.ukseoforums.com http://www.ukwebmasterworld.com http://www.forums.webconfs.com http://www.seobetter.com http://www.zymic.com http://forums.mysql.com http://developers.evrsoft.com http://www.htmlforums.com http://www.geekpoint.net http://www.talkfreelance.com/ http://www.googlecommunity.com http://www.smallbusinessforums.org http://www.googlecommunity.com/forum http://www.daniweb.com/forums http://forum.newsgator.com http://forums.feedburner.com http://www.feedforall.com/forum http://www.bloggerforum.com http://www.bloggertalk.com http://www.rss-forum.de choose from here and try this friend
Big board have a great list of forums of all niche . Use that site and search for forums related to your niche