Learn guitar with your iPod watching the iPlayMusic video podcasts. There are currently 35 lessons offering a variety of information from guitar chords and strumming patterns to Chord Transitions & Finger Strength Techniques.

From the website:

The iPlayMusic Training Center is an innovative and exciting place for beginner guitar players to learn to play and practice their skills. We offer a variety of information from guitar chords and strumming patterns to Chord Transitions & Finger Strength Techniques. This training center is designed to give you the skills you need to play the songs you love.
iPlayMusic looks to be a relatively good resource to learn guitar basics even if you aren’t interested in the video podcasts - that said, the videos look well made and very useful.

iPlayMusic