If you join Canon Professional Services at the gold level - you need to have two pro bodies and a few pro lenses, I think - it costs you $100, but you get two cleanings free per year, and 30% off repairs. You also get priority service for repair turnaround. I think what this means is they move you to the head of the line when your gear comes in. Of course, this means that if you don't have CPS, you get bumped to the end when CPS gear comes in...