There doesn't appear to be much information regarding the size of the NK nuclear devices that have been tested.  The general consensus though appears to be that the third device tested was significantly smaller than that in the second test and with an explosive yield of at least twice that of the second device.

In a way, it's like the first person to climb Mount Everest, or the Matterhorn.  It's incredibly difficult, almost impossible, the first time.  But thereafter it becomes easier.  The knowledge disseminates, spreads around, so to speak, even through non-classified periodicals - common knowledge.

Yes, their "nuke" is probably huge.  But if they acquire information from other countries, like Pakistan, for instance, they might somehow be able to bootstrap themselves forward a bit.  That is the problem!

Now it's reported that the Communist Chinese are planning a demonstration of their own.  Why?  Is this in support of fatso's regime, or is it a not-so-subtle threat against north korea.  You know, a sort of "behave, or this could happen to you" comment.

I hear the hacker group 'Anonymous' are working on hacking into their very insular internet to show the enslaved and brainwashed population of NK what the big world is really like , lets hope they crack it.

From what little I've found in the news, the US has sent some bombers to Guam, along with other aircraft.  The government seems to be doing this quietly, although there seem to be some deliberate leaks about the subject.

At this point, it truly does not seem likely that north korea will actually do anything, except figuratively waive their weapons around...

I hear the hacker group 'Anonymous' are working on hacking into their very insular internet to show the enslaved and brainwashed population of NK what the big world is really like , lets hope they crack it.

There's nothing to "crack", algas, basically only the govt. and the military have access to the internet.