In addition to posting in forums and such, I would recommend running a press release campaign, which I could gladly do for you. I run a small PR firm, and am a professional writer and editor, currently and previously working with major online networks. I'm well aware of many of the freelance writing forums available, as I actively participate in them. However, before I could promote a service under my name with people that I've already built a professional reputation with, I'd need to learn more about your service, fees, and requirements. Please feel free to contact me.