I read about these new biology examples for intro chem in a recent Association for Women in Science (AWIS) Washington Wire (December 2009, Issue II).  Professor Catherine Drennan from MIT and her colleagues introduced "examples of biological and medical topics that demonstrate chemistry principles into her introductory chemistry lectures to highlight the connection between the fields of biology and medicine, that students often love, and chemistry."  Their assessment showed that the examples increased student satisfaction with the course.

A neat site that quizzes you on chemical symbols (e.g., Ag for silver), and donates rice for right answers. Hey, if students are going to learn chemical symbols, they may as well do it in a game setting, and many will find it a touch less pointless if they're doing someone else some good at the same time.

This website is a self-paced review of concepts for gen chem and includes test questions (and answers) for the reader.  It would be a great site to point your intro chem students to if they want/need extra review.  It is a set of 10 units, covering things like stoichiometry, unit conversions, and basic acid-base chemistry.  

http://assign3.chem.usyd.edu.au/spectroscopy/index.php

A series of Java tools for learning about the relationship between molecular parameters (size, mass etc) and the form of the spectral trace. These cover rotational, vibrational, ro-vibrational and electronic spectroscopy.

While this site is also a commercial site (selling Theo's periodic tables and book, etc.) it is a wonderful resource of pictures of elements and their compounds, and "real life" uses of elements (such as a gamma ray imaging of the skeleton for Tc, a hard drive for B, and sushi for Hg!). It is also a source of movies of reactions of the elements, including some pretty impressive ones for the alkali metals and the thermite reaction. It also provides easy access to his chemistry column for Popular Science magazine.

This website provides access to many formulations of the periodic table over time. I think that looking at the various representations of the table would provide an excellent way to discuss periodic trends.

This list was compiled by Mark R. Leach and is part of his free resource, The Chemogenesis web book.

At the end of my inorganic course, I teach several "cool" spectroscopic techniques that inorganic chemists use.  These techniques are discussed within the context of bioinorganic chemistry, and I typically cover EXAFS/XANES, X-ray crystallography, EPR and Mössbauer.  

This website introduces (or reviews) Fourier Transforms in a neat graphical way, but most importantly, illustrates the phase problem.  Given the intensities from your crystal and the phases from your model, the phases are more important!  Which is too bad, as we don't have ready access to that information.