OLMIS (from the Oregon Employment Department)
Labor market information & more.
Includes a career test.
An excellent site to get you started with online job searching.
Occupational Outlook Handbook
The Occupational Outlook Handbook is created by the United States Department of Labor, and includes information about the nature of work, working conditions, training and education, earnings, and job outlook for hundreds of different occupations. The Handbook is released biennially with its companion publication the Career Guide to Industries. The current 2008-2009 edition was released in December 2007 and includes employment projections for the period 2006-2016 (from Wikipedia).
Legal information & employees' rights.