Chrome browser betas for OS X and Linux - very fast!
I had not tried Chrome before because of WAS (Windows Avoidance Syndrome). I like the minimalist Chrome UI - very nice. When I boot OS X, I also like to use the new Safari 4 beta.
I have been very busy this year - not too much free time to try new things. Now that I am done working on my new book, I hope to have time to experiment with some technologies that I have not tried before like writing a web application that optionally uses Google Gears for local storage.