I love this. I've been thinking about the error we've made in stuffing so many enterprise interfaces into the browser (I say this as a web developer).

Somehow we decided to trade-off upfront training (no longer required) for long term speed & productivity (no longer available).

An interface that can be used by anyone with almost no training, is almost certainly a low productivity interface.

I haven't expressed this very well. But, in short, I love this and would download and use it tomorrow.