Chrome 11 adds HTML5 Speech Recognition, improving accessibility, and no doubt leading to Web apps which mimic certain mobile apps like Google Voice Search. Chrome 11's Speech Recognition worked quite well in our testing, and you can give it a go yourself by visiting this demo page.
Mac users will also find that Tab Overview has been enabled by default, Chrome 11 also includes improved support for the newer MacBooks' accelerometer. Finally, there's an experimental New Tab Page designed for touchscreens which you can enable on about:flags.
If you're on the beta channel already, you should be upgraded to Chrome 11 automatically. Want to install manually? Grab the Google Chrome 11 beta from this page.