One criticism of existing virtual worlds is that they are separate services and users can't easily move among them. Google's offering, called Lively, attempts to address that issue by allowing users to create virtual rooms that can be embedded in Web sites and blogs.
Visitors to such rooms also can view videos and other content running on other Web sites such as Google's YouTube, a feature not typically possible on some other services. "We feel it is fully integrated with the Web," said Sara Jew-Lim, a Google spokeswoman.
You can check it out at Lively. To use it you have to download a small client, you can then access one of the hundreds already existing chat rooms via your web browser or create your own virtual world. I gave it a quick try but it took like forever to join a room.