Google has just unveiled the most anticipated official beta version of their Chrome browser for Mac and Linux. The new Mac version supports OS X keychain with Mac-style animations. While the Windows version will now have new Chrome Extensions which is used to add to about currently available 300 functionality to the browser. Unfortunately, as of now there are no extensions for Mac, but Google assured it to follow.
You can download the Google Chrome for Mac here and see other details here. You can also head on the Chromium blog for details on how you can create extensions in your own.