If you want quality forum, then my first choice is MOZ community (http://moz.com/community). There is also Digital Point (https://forums.digitalpoint.com/) and SEO Chat (http://www.seochat.com/). I have been in other forums too, but I think these forums are best among the lot in terms of quality and in terms of activity.

Just google it "seo forum". You will find a number of good forum and their respective PR(page rank) if you have installed SEOquake to your browser. PR 1 forum not so very important. PR 9 indicates highly recommended. Thus serialize your list according to PR. You can download SEOquake for free.

blackhatworld.com is the best SEO forum in the world.

Hi Kirk

you can find on goole,

seochat

dugitalforums

warriorforum are good for SEO

http://www.topseoforum.com/