This page is a collection of the best tutorials and how-to guides for a large assortment of chipmusic related interests.
Arduinoboy - This is the best tutorial I've found to date. Features the arduino pro mini, which I presonally prefer due to its smaller size.
Pocket Backlighting - Customer submitted video. Thanks Trailblazer5280!
Resources for Development and Research:
http://www.google.com/patents/US5184830 - Patent page for the DMG, including intricate design details.
Nonfinite Electronics tutorials and videos