http://federalreserve.gov/careers/ra.htm
For me it was a great way to parlay my economics training into a programming career, even though that wasn't what I was interested in at the time. It's also a great career stepping stone if you're interested in graduate education (not necessarily econ), government work, policy work, law, or myriad other fields. If you want more info, let me know and we can talk offline.