Links about salaries for different majors (Notice that economics always has one of the top median salaries, for both entry level and mid-career):

http://online.wsj.com/public/resources/documents/info-Degrees_that_Pay_you_Back-sort.html

http://www.studentsreview.com/salary_by_major.php3

http://jobs.aol.com/articles/2009/01/26/todays-best-entry-level-salaries/

http://blogs.payscale.com/salary_report_kris_cowan/2008/07/list-of-best-co.html

http://money.cnn.com/2006/02/13/pf/college/starting_salaries/index.htm