On the weekend I got to play one of these...
Check out the specifications.
http://tinyurl.com/yfa3vhk
This is a very small instrument actually. I'd guess about the same size as a tenor uke. Tuned like a guitar but pitched higher by a 4th. IE it's like playing a regular guitar capoed at the 5th fret.
Very good quality. Projects surprisingly well.
I think this has potential not just as a travel guitar but as an instrument in it's own right and with it's own possibilities.