The Non-Linear Lab is an excellent introduction to non-linear dynamical systems and questions related to chaotic behavior.
The Chance website contains materials for a quantitative literacy course, including Chance News, a monthly electronic newsletter dealing (mostly) with news articles related to mathematics (predominantly probability and statistics).
The winners of the 1998 Westinghouse Science Talent Search have been announced. The first, fifth, and eighth place finishers are in mathematics, as are two others in the top forty.
Life by the Numbers, a seven part television series on mathematics, to air on PBS April-May, 1998.