To my knowledge anyway, there's no affiliation with the reddit.com admins; the admins here are simply using the (freely available) reddit site code. As for who runs it, I have no idea, though at least one of the admins seems nice from my short correspondence.

That's why the logo at the bottom says "powered by reddit" - it's referring to the codebase that runs reddit, not the actual reddit team. That code is open-source.