As reported Google sent out a comic book unveiling the Google Chrome browser. Google now also officially announced Chrome on their blog and says that the beta version of Google Chrome will be available for download today.
Google's reason for launching a new web browser is their believe that they can add value for users and, at the same time, help drive innovation on the web. Google is releasing a beta of Chrome for Windows today and is at work building versions for Mac and Linux.
More details on the Google blog. See also the first Google Chrome Screenshot.