Bureau of Labor Statistics
   US Department of Labor's statistics on CPI, unemployment, payroll employment and a variety of other employment statistics.
   http://stats.bls.gov/

Economic Research Institute
   Analysis of salary and wage survey data, executive compensation, cost of living, and geographic differentials for relocation and pay planning.
   http://www.erieri.com/

Professional Actuary Salary Survey
   Entry-level through experienced actuaries are documented. Information for math and statistics majors, as well as those in actuary jobs.
   http://www.actuaryjobs.com/salary.html

SalaryClock.com
   See your salary earnings in real time. Compare it with the earnings of Bill Gates, Bill Clinton, Tiger Woods, Michael Dell and others.
   http://www.salaryclock.com/

Wageweb
   Offers handy charts detailing national averages for various professions.
   http://www.wageweb.com/