In the word of Jean Pierre.
I would like to inform you that Apple dealt with, without particular pressure applied on my side, the complete repair of my water-cooled bi-G5. The mothercard, the processors and part of the case were changed without problem.
Difficult to say if the decision was made in-house to make the repair free of charge, or if customer service had an unused quota of commercial gestures. It will be necessary to wait to know exactly what line Apple is taking.
[translation by crispin]