There is a new app for iPhones too. It's called iReadMusic. There are several different games to help you learn music notation. I like the one where it shows the notation on a staff, and below that you tap the fretboard at the correct fret. It also makes a tone to train your ear as well. It's been very very effective in helping me to begin to sight read as well as naturally going to each note on the fretboard as I read it. It's cheap too (.99 cents)

GG