Google has launched a browser based virtual world environment called Lively. Lively lets users create and custom design worlds and avatars and interact with their friends.
The worlds you create can be embeded in your webpage. For now only Windows users with either Firefox or Internet Explorer can see them, but support for Mac and Linux will be available soon.
So far the main difference from Second Life is that users can’t move and interact in a single online world. Several pre-made worlds are available that users can improve (add or move furniture etc.) or create new ones alltogether.
A brief presentational video is available :
If you can’t see this video click here.