Via Matt Yglesias (via Ryan Avent), an interactive map of job listings per capita for US cities:
Washington, DC has far and away the most job listings - more than 132 per 1000 people. And Baltimore easily takes second, with more than 90. As Yglesias notes, "the metro DC economy is in better-than-average shape and I think that may have a distorting influence on how the hill and the press are seeing the national economic picture which continues to be very bleak despite the fact that the financial panic has ameliorated." The media centers of the US, however, aren't doing nearly so well: New York has less than 28 job listings per 1000 people, and LA has less than 24.
The techie cities of San Jose, Seattle, and Austin are all doing relatively well; the Rust Belt not so much - of Midwestern cities, only Milwaukee has more than 40 jp/k, and Detroit has the fewest of any city: less than 15. Miami is in second-worst shape, with just over 17. The full ranking of the 50 metros are listed with the map here.