Great Washington post article about the tech behind the Ohio state marching band shows that everyone has been going nuts over on the internet lately.  The students all have iPads and a program that takes information from pyware and turns it into a virtual drill book. Very cool!
http://www.washingtonpost.com/blogs/innovations/wp/2013/11/05/ohio-states-marching-band-revolutionized-halftime-shows-heres-how/