For about the last month now i've been "playing" Rocksmith on the 360. It's a "game" where you plug in a real electric guitar to the 360 and play real rock songs.
It has been an incredible learning tool and definitely one to study if you're looking to do e-learning right.
As of a month in I'm playing 5 or 6 songs at nearly 100% of the guitar part. Last night I played one song in "master mode" which means I played the entire song by memory, and I managed to hit 96% of the notes...not bad for one month of lessons.