Find the pay ranges for hundreds of jobs on these sites
Salary.com [1]
Look up salary information for hundreds of job titles
Payscale.com [2]
Salary information based on surveys from workers themselves
U.S. Bureau of Labor Statistics Occupational Outlook Handbook [3]
Find median salaries and job projections for hundreds of careers
Links:
[1] http://www.salary.com/
[2] http://www.payscale.com/
[3] http://www.bls.gov/oco/home.htm