I think that at the elementary and early secondary school levels, Garage Band could have an amazing impact. Even if it's just one Mac in a music class as opposed to a Mac lab, a collaborative class composition project would do wonders to introducing kids to composition, arranging, playing, even engineering, production and understanding the depths of the parts (instrumentation/arrangement of said instrumentation) that exists in music. You can't look at all things through grown up and professional's eyes. This program could honestly have an immeasurable impact on music classes and music education in the earlier grades. Just MHO of course.