Ngmoco's multiplatform javascript game engine

I just discovered this through a mailing sent by ngmoco to developers. While Mobage is not specially interesting to me, I'm definitely captivated by the technical approach. Sadly we can't look at the code. Having an engine where the platform specific code is javascript and the rest is native could mean deploying anywhere (desktop, consoles, mobile, and even the browser) (and all with a quite beautiful scripting language when using CoffeeScript). The only engine that can do this today is Unity3D, but it requires a proprietary plugin to run on the browser.

I suppose both projects are a proof of concept that Javascript works for multi platform game development. Although how Unity ports to the consoles is a little obscure to me, I don't know if they mangle with the source code. I don't know if it's feasible (or efficient) to deploy an engine that includes a javascript interpreter on consoles.

With the traction javascript has been gaining lately, are there any open source projects going in this direction?

no one gives a shit