Foursquare is a company with all of four employees. Yes, they just hired their fourth, we’ve learned (hello, Nathan Folkman, formerly of Betaworks, where he worked on Bit.ly). And yes, that’s a fitting number. You might think that a company that recently closed some funding would ramp up hiring a little faster, but the truth is that they don’t have to. Why? Because their users are already doing quite a bit of work to expand and improve the service.

You see, some users of Foursquare that are very active earn the label “Superuser.” These are users with privileges that allow them to edit certain aspects of the site, which I’ll get into below. Full disclosure: I’m one of them, but only because I use the service so often. But I’m also only a “Superuser! – Level 1.” Today, the service started upgrading a very select group of users to the new “Superuser! – Level 2″ distinction. In total, less than 1% (o.7% to be exact) of Foursquare’s user base received that distinction.

The plan is to eventually have three levels of Superusers, but right now, there are only these two