Acoustical Society of America: http://asa.aip.org. This Web site contains job listings in acoustics.
American Association for the Advancement of Science : http://nextwave.sciencemag.org. This homepage includes an extensive array of career resources for scientists. These include forums, a fledgling postdoc network, and career advice articles.
American Association of Physicists in Medicine: http://www.aapm.org. This Web site contains a list of accredited medical physics programs. AAPM offers a career brochure and monthly job listings (for members only).
American Association of Physics Teachers : http://www.aapt.org. This Web site includes reports from the Physics Department Chairs conference series (click on the Programs link). The National Task Force on Undergraduate Physics Web page can be accessed here also.
American Astronomical Society: http://www.aas.org. This site has an extensive set of career resources, such as job listings and registers, statistics, and an industrial astronomers network. AAS is conducting an AAS...