As announced on the Google blog, there is an official stable release 3.0 of the Chrome browser available now. You can download it here, and if you're already using Chrome, you'll be automatically updated to the new version. Google's post includes walkthroughs of some of the major new features, including significantly faster Javascript performance, a new look for the New Tab page, and improvements to the Omnibox--the search bar and address bar that makes it very speedy to navigate to sites you're looking for. Here's what you'll find under the hood in the new Chrome.
The Omnibox now has an enhanced drop-down menu that includes icons so that you can distinguish between URLs, bookmarks, searches, and more, as seen here:
This new release of Chrome also includes many HTML 5 enhancements. According to Chrome developers:
"We're particularly excited about the <video> tag in HTML5, which makes embedding videos in a page as simple as embedding regular images. The <video> tag also allows video playback without a plug-in. You can give the <video> tag a whirl in Google Chrome and also check out our 50th Chrome Experiment, which uses HTML5 <audio> and <canvas> tags."
Google has been testing themes for Chrome for some time, and they are included in the new release. You'll find many of the available browser themes at this page, and you can see snippets of several of them below:
 
As you experiment with the new Chrome, you can provide Google feedback on it here. Chrome is now officially one year old, and it's good to see it advancing and getting speedier. The benchmark charts below, from Google, show version 3.0's speed improvements in Javascript tests, which look substantial (bigger is better in the first chart and smaller is better in the second one).