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@GA2G
To be honest, Tsuzing has appered on the different blogs, and has only asked to be given time to investigate the failure.
Things fail on bikes; whether they be rims, saddle rails (Ti?), frames, seatposts, or whatever. Just because one thing fails, shouldn't mean that the line is defective. I respect the maker a lot for taking the time to interact with his customers, and also thereby try to improve his product.
I know the rim failure looks bad, and if I was on that and coming down a hill, I'd be typing this email from a cosy chair in Hell (they make a lovely pizza).
But seriously, couldn't this have been a case of over-inflated inner-tube? I don't know the max recommended psi on that rim, but it looks like it could have been exceeded, and by a large margin. Either that, or it cleared Quality Control, when it shouldn't have.
I'm sure they'll be much more talk about it, but at least we know that the manufacturer is really listening.
Oh yes, and Hippy's expertise in such matters does show, and I think he should be listened to:
***"It's obvious the rim exploded at the valve-stem drilling in the rim. What most likely occurred was that the rider made an error we all have at some point; he didn't properly nest the tube and tire within the hooks of the rim's cross-section. ***
What usually happens when you do that is your tube slips past the wire bead of the tire and forms a bubble. You can ride on it like this, but it will eventually explode. From my observation, it appears that the rim's inner wall was weaker than the tire bead and it took the released force the hardest resulting in the damage shown above."