oh I think it's just a mockup of what such a program could look like.

I'm a musician as well, and can't wait to get more music software on my tablet, right now the most useful thing I've played around with is PDa (http://gige.xdv.org/pda/)

At some point today I'm gonna try to get a USB > MIDI adapter working, so I can leave the heavy lifting to my MIDI hardware, and use the tablet for sequencing.

I'd like to get seq24 going for sequencing (http://www.filter24.org/seq24/), unfortunately I had troubles getting it to compile, and gave up for now