It's a prototype from Eleksen, the company that makes fabric buttons. Just look at it, in all its cloth-y, clicky, gadget-protecting goodness! The guy from Carrypad UMPC blog says he can type very fast on it, despite the keys having no travel: about 55% of his normal rate within 30 minutes of practice. And the Eleksen guys say its possible to make this bag a Bluetooth device. Sure, sure. Big words from a company not even making the standard USB version yet. Produce them! We shall buy!
Eleksen Bag Keyboard [Carrypad]