Well, this is sort of the place to start researching. Perhaps you could lend a hand?
Remember, some people are interested in domain names and sites, while other people are interested in domain names only. You'll probably see research from both sides.
From my experience in hosting and similar industries, I'd say that's a pretty solid domain name for attracting the likes of gamers. Usually they like free stuff, but if you can offer them something that they consider essential, like good hosting, they'll pay a pretty penny.
enjin.com comes to mind as a similar service, and they've seen a lot of success recently.
Assuming this is your domain, you're definitively onto something, but since you've already got a site/service going, you'll have to put some effort into how you market it. The right kind of buyer will pay for such a setup, since it does seem to have potential. Most domainers will be looking at raw traffic and such for a quick assessment, which isn't so applicable here.
In response to the OP, at a quick glance, I would say that this site has something going. It's a pretty good domain for this type of service: the sort of thing that customers will expect and feel comfortable with. It's a plus that the service is already up and running. It looks like you'll need to do some marketing on your own, as the service isn't that popular yet. You'll also need to be skilled enough to maintain the service. It's the sort of thing that you might want to buy if you intend to establish a few really good domains by offering online services. You'll need to work for an increase in value, but there's plenty of potential.