Prof. Keith Griffioen maintains a mailing list with job opportunities.
The AIP Career Web site has a proven record of providing helpful career information and job opportunities for both undergraduate and graduate students.
National Academies Career Guides
The National Academies have published several reports related to career planning, including a series of publications ranking U.S. doctoral programs in several different disciplines. Other topics include scientific ethics and the experiences of women in science, engineering and medicine.