The BLS has a program called the Job Openings & Labor Turnover Survey (JOLTS) that tracks and publishes data on job openings, hires and separations.
I find this data interesting and one that can elaborate more on what is going on in the labor market than what only looking at the official unemployment rate will. I will be maintaining a spreadsheet to track and graph data from the JOLTS Program as it relates to openings, hires and an interesting ratio called the Stock-Vacancy Ratio.
I found this ratio in a report from the BLS titled “Job Openings continue to grow in 2012, hires and separations less so”. The report can be found here.