https://github.com/Famous/guides
The biggest disappointment is what seems like less-than-rock-solid desktop browser support. Support for iOS and Android only with "Broader support for more browsers is coming"?? (After all the discussion of not releasing until everything is rock solid?) I noticed it with some of the initial demos that didn't allow you to rotate the element chart using your mouse, but it worked fine on an iPad. For all the talk of 3d, I don't see anything on par with a three.js in the source.
Seems like React + a physics engine...