Google Chrome is now available for Mac OS X and Linux. It is a developer release and is largely unfinished. Although incomplete, the browser can be used for casual browsing. Several features like Flash support, print support, changing settings and other things are not available at this time.

Mac OS X and Linux users could give it a try and help google by sending the crash dumps and other anonymous statistics. The developer build for linux and Mac is available on the chromium developer channel.
Download: Google Chrome for Linux and Mac