This is a really, really, really great idea that I've been thinking should be practical for a couple of months now. I wish these guys the best of luck. I even started work on a (not yet even vaguely functional) prototype of an open-source version of pretty much the same idea ( <a href="https://github.com/seldo/makomi" rel="nofollow">https://github.com/seldo/makomi</a> )