I took a listen to the samples.. A couple of tunes I liked, the last 2 wouldn't play..
I don't think Ukulele musician are going to take over the guitar world..
That's my guess..
It does look like a hand travel tool, good for strumming practice finger strength..

http://www.last.fm/music/Eddie+Vedder/Ukulele+Songs

Have a great day..
Gordon