I really like the loosely coupled approach.

However, I think that sprinkling andro.eventer all over the place is a stumbling block to me - it's essentially a global variable.

I realise that you don't want to polute the objects too much, but why not just add bind and emit methods to the composed object? Either that or pass andro as a parameter to the mixin's setup method?

Also, the bind(this, "touch", function...) to me looks like you're binding to the "touch" event of "this". Is the closure tax really so high that you can't store "this", or use something like jQuery.proxy()?

Like I said, I think this approach has a lot of potential, and seems to fit quite naturally the eventful model that the DOM uses.