Personally, I do not think anyone would accept this kind of service.
Are you serious? LOL. There are SO many people that offer this service its actually quite amazing, I dont mean any offense. Try going to getafreelancer.com, scriptlance.com, elance.com, myspace.com/jobs, craigslist.com. Goto google.com and search for "forum poster job" Keios and you will find millions of sites, companies and people looking to pay you for forum posts. And your pay per post amount is pretty good as well. Usually sites like it when you charge 10cents to 20cents per post pending on the amount of words per post. Theres also some money in posting articles for people, doing odd jobs for people (databases), and a lot more.
Good luck!