AAHHAHAHAHAAAAHHHHH!
Ok, I feel better now.
Initial estimated 400kT yield.
Is that what the talking heads are saying? That's a pretty large nuke, especially for a test. I would be very surprised if that was really the case.
Brett
I'm going to withhold judgement on this all together until a reputable source (read: first world nation's govt... ie. probably us) confirms it with either seismic data, gamma ray satellite evidence , or some other intel.