On request, here are a couple more charts relating to job postings on Patently-O Jobs. The first chart shows the typical locations for jobs posted on the site. Please note, there is some overlap. Thus, NYC jobs are usually also classified as Northeast Jobs. Washington DC is the focal point of the MidAtlantic jobs, although there have also been a number of post from Atlanta and the Research Triangle area.
The USA map shown below represents Patently-O readership intensity. About half of the readers come from the top-six metro areas of Washington DC, NYC, San Francisco / San Jose, Chicago, Los Angeles, and Boston. Of course, you'll note that you can find readers multiple readers in almost every metro area in the country.