O*NET online- Find details on occupations through skill requirements or key words.
The Princeton Review - The Princeton Review is a student information clearinghouse. It has a career search section. You must register with the web site to use its career database, but there is no charge for registration. Has an interesting career quiz, the results of which provide you with links to detailed descriptions of several careers.
New York Career Zone - Put together by the New York state department of labor. Categorizes occupations into six clusters. Has a pretty comprehensive list of careers, and you can use the links to find some good information, especially in the areas of tasks, skills, knowledge, and education. Keep in mind that some of the info (e.g. salary) is specific to New York state, so it may not be entirely representative of other states.
Career One Stop - A comprehensive source of occupational information, with many links. It even has video presentations for different careers and career clusters.
The Oregon Labor Market Information System - A detailed site with information about the labor market in Oregon. The career information on this site is very "statistic" driven and less narrative, but you still might find something useful. Affiliated with the acinet.org site
Oregon State University
University Exploratory Studies Program
102 Waldo Hall
Corvallis, OR 97331