Actually, Bush has said that all options are on the table regarding N. Korea.
Our coyness on N. Korea is actually brilliant. Some of the best advice I ever got was, "If THEY need/want YOU at a meeting or event, be there 5 minutes late. If YOU need/want to be at a meeting or event, be there 5 minutes early."
There are lots of countries (some who are hesitant on Iraq) that need us at the N. Korea situation, and Pres. Bush appears to be following the "5 minutes late" rule (ostensibly, anyway).