I take virtual piano lessons with a guy in LA and I love it. I can record the lessons and refer back at any time (including adding time stamps, comments, etc.). There are some downsides related to small audio delays - you can't play together, teacher can't count a beat while the other plays, etc. - but we work around that pretty easily. I don't have to leave my home and it's much easier to schedule when you don't have to figure in travel time. Or take a shower.

I really like All Things Musical. Especially if you like jazz, George is one of the best around.