Links out to training video's on Vernier's website. They have some tips, tricks, and hints for making experiments that you already do with your students, in addition to some ideas for new labs and demos.
This guy has posted a ton of screencast tutorial videos for math and physics. Chemistry teachers may want to reference these to help students with their basic skills.
I just got friended in Diigo from someone who had this site bookmarked. Very cool stuff for science, especially chemistry. I love this guy's personality. Very entertaining!
Here is a great example of delivering content digitally to students (for free) from Standford University. You can access them via iTunes or YouTube. Tim and Kathy, these lectures are all physics-based. Definitely worth a look!