TechCrunch has a post about a new startup called iVideosongs that is offering video tutorials on how to play guitar from world-class instructors, musicians and sidemen. The site offers some free tutorial videos, but most cost $5 (for instructor videos) or $10 (for artist videos) that play in QuickTime of an player that supports H.264 playback.
The site has launched with a catalog of 50 songs, plus 25 free tutorials. By the end of the year, it hopes to have 1,000 different songs. Instructions for how to play the drums and keyboard are available as well. The content is downloaded to your computer once purchased and appear to be DRM-free. I looked over some of the lesson previews and they look great.