In my biomechanics class I’m working on building a musical interface that the user interacts with by dancing. Check out more info with these posts on my class partner’s blog and the class blog:
http://technochicblog.wordpress.com/2013/03/09/bio-final-project-concept-development/
http://www.diybiomechanics.com/2013/03/25/project-update-musical-dance-interface/