Well, we have some choices, right? We can take a strong posture. Jim Il Jong (aka ratface) then either attacks, or retreats. If he attacks, we face a messy two front war. If he retreats, we win lots of diplomacy points (good!), but his regime might not survive...so it seems unlikely that he'd do that.
If we have a pre-emptive strike at the nuke plant (which is tempting, I must admit), we still have a real issue about a two front war.
Sorry to disagree, but I just really don't like multifront wars...the logistics can be deadly to OUR troops. Why not finish Iraq off, then start squeezing ratface and his regime until they fail?
In fact, the rationale for attacking Iraq becomes very hazy indeed when you consider the fact that North Korea is a much bigger threat to the world, both with regards to nuclear weapons and its ties to terrorism and Al 'Qaeda.