If you know of a song that you think would make a good lesson, here is the place to bring it up. As of May, 2015 we have over 800 song lessons but are always on the lookout for more. Be sure to point out what about the song makes it a good candidate, unique or unusual, a particular part that interests you, or just that you think a bunch of members would enjoy it. An embedded video would be helpful as well.
I appreciate the question but I have no answer just yet. I have spent over 20 years on this and I feel like I am about 90% there, as far as having it under control. I have recently been asked about a few other huge projects (White Bird, Last Train Home, Clap...) and hope to get to all of them. Part of the problem is trying to come out with 2-3 new lessons a week. These big ones almost require some sort of sabbatical to finish. I am always looking for a balance but the big things require about 10 times the hours available for most lessons.
Hoping I can make them all happen in this lifetime though...