Indeed (a job postings aggregator) has some cool tools to compare trends of keywords in job postings. For example, you can look at C#, Java, Ruby or the like. They also have a cool feature where you can compare all the job postings per capita across various markets. San Jose area is tops with 99 jobs per 1000 people, while our beloved DC area comes in 3rd at 92 jobs per 1000. I don't think the map they put on that page is very attractive or useful. It's a Flash thing that seems...primitive in a way. Still, comparing the ratio of available jobs to the number of people in area is a better metric than the raw numbers. It also helps me feel a little better about the slow pace of recruitment I have been able to achieve.