Hey Mike! It's great to have you back again. (You'll have to fill us in on the details of your North American tour)
Yes indeed... as Robert mentioned we are only days away from beginning a new revision of The Art of Animation:Master exercises.
The old exercises aren't going anywhere any time soon though and are still very relevant.
The TaoA:M forum area can be found here: http://www.hash.com/forums/index.php?showforum=108
...and the Youtube version of the current videos can be found here: http://www.hash.com/index.php?pcode=video_tutorials
If you are able and willing we'd love to include you in the effort to revise (improve and enhance) TaoA:M.
One thing that would help tremendously is to write down notes (either on paper or here in the forum) about what comes to mind or captures your attention as you go through the exercises . If something could be clearer... if something could be expanded upon... if additional information would help you learn A:M easier... or better... we want to hear about it. Of course the primary benefit to you is that you'll learn faster and more thoroughly in the process of diving that deeply into TaoA:M.
Welcome back! You've picked a great time to reappear.