The iPhone - almost everyone seems to have one!  We constantly hear, "Is there an app for that?"   For musicians, there are several apps available.  Visit www.iPhone.rogame.com for some of the best:

Almond: Music terminology dictionary with over 1,400 listings & 200 illustrations

ChordLab: Multi-tool for musicians, chord spelling, circle of fifths

EarMan: Intervallic ear trainer, built-in curriculum, automatic grading

ScaleMaster: Intuitive scales reference over 100 scale types, 4 clefs

BandMaster: The band in your pocket - bass, drums & piano

Mozart: Learn to read music in a game with six virtual instruments

Of course, the apps are available and work on the iPod Touch, just as well as the iPhone!