Well, before things have goten too far off the ground, I have taken a hiatus from this project.
I am moonlighting as a contract developer at EA Sports developing interfaces for FIFA 2004.
This does give me the opportunity to learn some code architecture tips from some of the best in the business. I am working on the online portions of the game, so many of the concepts will directly translate to musicolab development.
I'll try and continue to post, hopefully on a more frequent basis.
Very nice documents.
http://www.grc.nasa.gov/WWW/usability/documentscss.html
Maybe a little strict for many applications, but exhaustive like no others I have seen.