http://www.tuaw.com/2012/10/01/jorno...etooth-keyboa/

From TUAW link above:
"Back in the days of Palm, I recall being thrilled about some of the folding keyboards that were developed for the iconic PDA. They connected to the Palm device via a mechanical connector and made it easy to type text into Palm applications. Now a California company, Jorno, is seeking funding for a pocket-sized folding Bluetooth keyboard to work with your iPhone, iPad or Android device."

I used the Palm V and one of those bluetooth keyboards for hours on flights. No tray table too small.... On the few times when power became a concern I switched to just the Palm V + Graffitti + 1 fingernail filed a bit differently.

This looks like the smallest bluetooth keyboard I've seen, except for the roll-up kind which felt lousy when I tried it at a Fry's.