NK Nuclear Test

Is anyone surprised by this? It was only a matter of time. From the accounts I have read so far, the only question is "WWCD?", that is: "What Will China Do?" North Korea Zone has an interesting post speculating that China will, in fact do nothing of substance, that the Chinese have too much invested in the North Korean economy (such as it is) to risk utterly destroying it, and that they prefer an impoverished, but politically stable, North Korea on their border to a united, democratic Korean peninsula or the chaos resulting from a popular uprising. This view has a great deal of appeal to me, especially given China's lethargic response to the NK missile tests earlier this summer. Time will tell...