Numbers less than 400k indicate the employment market is expanding. This is good news...
400K is an arbitrary indicator of the employment market. For instance, if you lowered the threshold by 5% I doubt it would reflect a significant change in the employment picture . . . except of course the anti-Bushies would say "job market continues to languish", while Bushies would exclaim, "jobless claims fall by 23K or nearly 6% (optimist will always round up) in a week and 77K or nearly 17% since the April high."
A given report has very little significance (except for the people gaining or losing their employment). Under current conditions that real utility comes from tracking the trend. Jobless claims are clearly on a negative trajectory. It's good news if the negative trajectory is due to increased employment but you need a lot more information to assign causation.
In my state, there few new employment opportunities being created, layoffs have slowed but continue to outpace new hiring, and many people have been unemployed for many months. As someone noted above, exhausting unemployment benefits, grads favoring more school over the job search, etc could also explain the jobs report.