Yup, have been following for a while, a Wired article is great success.
Would also be interesting to see affordable fabbed amorphous or poly transistors on glass; the performance might be poor, but when all you need is a few MHz equivalent bandwidth or clock rate, then you can miniaturize the hell out of it. Like I could make this whole module,
in a single chip; the board is only needed because no one makes a chip that does the whole function by itself (it's a not-uncommon function, but chips only ever have it along with a bunch of other inseparable housekeeping functions).
Or epitaxy on sapphire, if you can get wafers of it at good enough purity. (Artificial sapphire isn't too expensive by itself; in fact you interact with it on a regular basis, it's the scratch-resistant windows on checkout machines.) Doing this in Si is still going to require vacuum apparatus, with CVD or sputtering; doing it with compounds like ZnS however could potentially be prepared in atmosphere.
Tim