[ddemchuk]

spend some time getting a fresh design on that site, and show off much more of the social activity on it. Make it look REALLY busy and active, so new users will want to jump in and participate.

Then I'd recommend some forum marketing personally, go get active on a few major gaming forums and use a signature link to your site. Forum marketing is very underrated but can be very lucrative if done actively. Plus you get to participate in forums you're already interested in (hopefully) so it barely feels like work