somebody to post on targeted message boeards

I need somebody to post on messase boards and websites that deal with web and graphis designers. It is to generate signups to my website (my site is the same concept as GAF or scriptlance) In bid please include number of posts and location (ex. 20 posts on GAF-alike websites, 200 posts on webmasters-web/graphic designers message boards/communities). You must provide me with an excel sheet with links to post so I can verify them.