Here’s a good video by CareerBuilder about .NET Developers. The data for this video comes from the Supply and Demand Portal, which uses EMSI Data. The Portal allows recruiters to search for data about the supply and demand for specific jobs and skills. EMSI’s occupational data comes into play on the demand side, along with a massive database of resumes that CareerBuilder maintains. Very cool stuff!
Also, CareerBuilder produced a great infographic that goes along with the video.