SEO Forum Posters Needed

I need a forum poster to reseach suitable forums ( webmaster forums, SEO oriented forums ) and promote my website in his posts signature or in the posts itself if appropriate. I need post of 40+ words. Well writen and substantiated. I'll give you some seo advises and articles about my website. I don't need to post the same thing again and again - all post must be answering the "above" questions and inquiries. all forums must have 500+ members. Payment per post, words and members of the forum i.e. - 100 words post in a forum with 30000 members is worth way more than a 100 words post in a forum of 500 members. I'll provide you with a username/passwords and email address that should be used for registration in the forums and require a list of all the posts you've made. No more than 5 post/week in a forum. Payment at the end of each week though Paypal or GAF. Escrow, if required, after the first week of work. Please, state your price for 100 post with 50+ words.