BuddyPress.org

depending on your budget you could try some adsense to launch. A simple $ 1.00 a day 30 day campaign may get you thousands of exposures and probably 90-140 hits a month. It may be $ 30.00 well spent to at least get your name out. You’d be surprised … (just be prepared for visitors).

On a critical note it may yet be too early to launch campaigns. You’ll probably want some more content first. (chicken and the egg).