Every forum is for publishing, Publisherforums.com say this explicitly. It's a webmaster forum with the accent on a web content: How to make a site, where to learn design, there is a strong advertising sections. You'll find pretty all SEO tools there. Links to places to submit your articles are provided and will be more. Exact places where to write articles and be paid for them are revealed.
It's a fairly new forum, they've set up a big promotion contest with $800 awards in cash. Contest has 3 parts: for top quality posts, for most posts, for the best contribution and for most points (go and check the rules). You can win in every part...
Not crowded at the moment, but you can expect exact answers on your questions. Fresh content highly appreciated.