More details here would be great! Seems like a souped-up version of Leaflet.

Man I love the stuff that MapBox puts out. High quality.

Why dont publish the webgl version as an openstreetmap client? would be awesome

I'm confused, is there a WebGL version of the framework as well? It would be really great to have that!

That's the one I was referring to. It was really, really good! :)