Check out these amazing videos of Project Skylight Beta, a SL web-based experience. This experience will give new users a taste of SecondLife on the web to see if they like Second Life or not. If new users like Second Life from the web-based experience then afterwards they can easily download and install the latest SL viewer from the official Second Life downloads page. Thanks to Gaikai cloud-based streaming service.
Second Life being used in Firefox Web Browser
Second Life, Rendered on the Cloud and Streamed to a Web Browser
There are promotional videos here at http://interest.secondlife.com/beta. It works for many but not for others at the moment to sign up to this new beta web-based experience.
Daniel Voyager 