well to be honest, its my lack of tracking skill that makes me wish for another way of using the piggy to midi. for example, the power or having such a midi capable sequencer in the pocket is amazing, but I write most of my piggy stuff using plof commands to jump around samples, actually tracking note by note to build up a composition like i would in ableton or bhajis i just find really difficult, hence id love to see just a basic basic app that could take a multichannel midi file and play it back.
obviously id lose a lot in the performance elements, but would be able to load up some midis ive recorded in anything and boom- play it back into a shruthi/ sammich combo and tweak out. i guess the trouble i have is efficiently building up soem of the polyphonic phrases id like to play back on the go using 16 step mono channels.
all you chipmusicians with a modicum of skill are probably crying HERETIC right now, and yeah i admit i just dont have the skills to do what id like with the piggy(+to midi!) Building up acid house mono sequences or crazy breakcore beat rushes on the other hand is amazingly simple, and why i ended up getting the gp2x and the interface in the first place.
I also thought that it might not be too difficult to get someone (or commission them to) working on a simplistic no frills midi playback app. I dont know how simple this would actually be like, as i am pretty damn noob.