Sounds cool, though would be muy dificil to get done... I'd like to able to have two tracks running and have a DJ turntable set up of sorts that would allow me to do my own DJ-ing. That would be pretty tight.
The idea of a guitar tuner based on a line-in cable would be brilliant. Alternate tunings could be done w/ ease. It wouldn't need much of a UI, just six columns (or whatever)(or seven i suppose) and have as little as 4 (for bass obviously). Then it would tell you which string you are hitting, prior to which you have selected the tuning that you want, and then how far off you are!
