BTW A little-reported fact: the DPRK claimed that it sent a satellite into space in 1998.
UPDATE: Oh no, Hans Brix!:
"For North Korea, the question may be what offers the best security — nuclear weapons of their own or a piece of paper.
Perhaps a piece of paper could be made more attractive if it were signed by all the relevant great powers and combined with a peace treaty...
Perhaps former US president Jimmy Carter will go again to Pyongyang, reminding Kim Jong-il and the regime of the wishes of Kim Il-sung."