ACM has created a nice site for students to take a look at to learn more about careers in Computer Science. http://computingcareers.acm.org/
The site lists the top 10 reasons to major in computing along with some description of computer disciplines. The majors and career opportunities are discussed as well.
Finally, there's a nice brochure teachers and guidance counselors can give out to their students.
Thanks ACM for a great job on the site!