"Ever wish you could do a quick Google Search as quickly as you can say Google? Now you can! With Speechify you can access many online services and use Speech Input to search and shop. Search Google, Hulu, Amazon, Youtube, and many more!"

Read a review here at TechCrunch.  The extension requires that Chrome 11+ Beta be installed on your computer.

On the Google Chrome Blog, this post announced the new Beta release:

Talking to your computer (with HTML!)

Tuesday, March 22, 2011 | 4:35 PM
Today, we’re updating the Chrome beta channel with a couple of new capabilities, especially for web developers. Fresh from the work that we’ve been doing with the HTML Speech Incubator Group, we’ve added support for the HTML speech input API. With this API, developers can give web apps the ability to transcribe your voice to text. When a web page uses this feature, you simply click on an icon and then speak into your computer’s microphone. The recorded audio is sent to speech servers for transcription, after which the text is typed out for you. Try it out yourself in this little demo. Today’s beta release also offers a sneak peek of GPU-accelerated 3D CSS, which allows developers to apply slick 3D effects to web page content using CSS.

Lastly, as mentioned in yesterday's blogpost, those of you on the beta channel will start seeing the brand new shiny Chrome icon on your desktops.

Stay tuned as we make all these updates widely available in the stable channel soon!

Correction (March 23, 2011): This beta release's Speech API implementation is a prototype of Google’s proposal to the HTML Speech Incubator Group. The title of the blogpost has been changed to reflect this.