My favorite Chemistry links - Check the textbook website for many more:
(The list will keep growing, and I welcome your suggestions)

The Periodic Table of the Elements

The Periodic Table of Comic books / ChemComics!

The American Chemical Society is the largest professional organization in the world and publishes the weekly magazine "Chemical and Engineering News"

The American Association for the Advancement of Science publishes the weekly Science magazine which is available on line at FIU.

Chemistry at Yale University. (Basic Chemistry Research at a major school)

Science at Oak Ridge National Laboratory (a major government laboratory)

Chemistry  at  FIU! Look at the research problems we are focussing on here at our very own FIU!

The Science Citation Index (a great search engine scientists use to find information about other scientist's work). It is my personal favorite!