If you're willing to go into computers or some type of analyst position, you might want to check out The New York Times . There are lots of jobs on Wall Street for anybody with a good math background. Another great source for jobs is your school newspaper. Big companies often place ads in these campus publications in order to recruit new graduates. Don't forget the smaller publications like the Engineering Department's newspaper.
Many big campuses have small newspapers that only go to specific departments.
These can be useful if you're willing to branch out into a closely related field. You can pick up a few cheap ones in the bargain bin at your local bookstore. I've read a couple, and they all say the same things. As for magazines, I would recommend any scientifically oriented publications. The American Institute of Physics and the American Physical Society put out magazines and newletters from time to time.