I'll apologize if this has already been posted and I just didn't see it...
...but here's Fraser's explanation on why the goal should have counted:
Everyone is going to interpret this play differently. I've seen it split both ways among hockey commentators, and among hockey fans in general, and I'm sure it's the same with league officials. In my opinion, Gaborik did not do nearly enough to stop or avoid Brodeur, and that's why it is interference. Also, I disagree with Fraser that Volchenkov's stick tripped him up. His stick is a non-factor until after they had already started to fall, at which point it gets tangled up.
Either way, what's done is done. We've had MUCH more questionable game-deciding calls go against us and there wasn't 10% of the interest as there is in this one. The Rangers need to stop their whine-fest and move on with life.