Hi, I'm the VP Eng @ foursquare. I'm sure my perspective is a bit different from shaufler (one of our eng interns who also commented in this thread), but I'll say that the NYTimes piece is pretty accurate. Dens is indeed quite humble, he holds open office hours every week (I've started doing the same), regularly has coffee with random employees, and he tries hard to communicate what's going well or not at our weekly company meetings.

I'm also happy to answer any questions anyone might have about foursquare culture.