I can answer that. We changed the policy to allowing remote team members as long as they are primarily contributing to open source projects.
The problem with being remote is how much you lose in communication when working on a project. You don't have that problem with open source projects. The design mocks, discussions, etc. on Github are the same as anything someone in the office would see.
Also ... it just got to the point where it was stupid not to hire remear (Ben).