In an interview with Gary Shavey, Zack explains:
My vision for Re:Greek is that it would be an Open Source project that could capture the imagination of software developers all around the world. I want to see dozens of developers and designers submitting improvements, new features, localizing Re:Greek into their local language, and innovating on this shared platform. I'll release more in the near future about how this will work, but it will be a model similar to Linux or Ruby on Rails if you are familiar with those projects.