The Electronic Privacy Information Center (EPIC) has a wealth of information on workplace and electronic privacy issues. Its Web site, http://www.epic.org/ , also features an alert service that will send you messages when new privacy- related issues arise.
The Electronic Frontier Foundation (EFF) maintains a Web site at http://www.eff.org; EFF is roughly the digital equivalent of the American Civil Liberties Union, but its focus is squarely on digital and electronic rights.
All of the United States laws discussed above (including the ECPA, the Wiretap Act, and the Patriot Act) can be read in their entirety at the United States Library of Congress. See http://thomas.loc.gov .