The issue with these kinds of meeting services seems to be that as the population of the online community goes up, the overall quality, and likelihood that you'll meet a real, friendly person, goes down. It's not guaranteed, but the ideals and culture of hackernews could help realize the full potential of that dream. As it says in the welcome page, "A community site that becomes popular will decline in quality... by making a conscious effort to resist decline, we can keep it from happening." I definitely think it would be something worth trying.