2010-11 Political Science Wiki (2009-10 Political Science Wiki for reference)
APSAnet--home of eJobs, the major job listing in political science
Chronicle of Higher Education--listing for political science
Chronicle of Higher Education--listing for "other humanities" AND H-net.org job listings
http://www.jobs.ac.uk/ (Look under listings for history as well as political science/government)
HigherEdJobs--listing for political science