Last year I had the chance to participate in one of the Leica Akademie Weekends with Craig Semetko and I can highly recommend it. The price of the 2012 course is $495, but you will receive a $150 voucher that can be used toward the purchase of any Leica serial numbered M products plus other freebies.
For more info check those links:
Craig Semetko also has a new book out:
