Welcome Yahoo Messenger 11. Although now it is still Beta, but usually not really take a long time for the final version to be launched.
Final version finally arrived, please read in the end of this post for the review and links.
To download the Beta version and install the standalone offline installer (not the web installer which should be online to the Internet first), please Click here. When I download this, the beta version number is 188.8.131.521-us. The main features here are Social Networking and Social Gaming. We can chat using the Facebook chat protocol, update YM status simultaneously with Facebook and Twitter status, and play Mafia Wars, Fish Ville, etc. The rest features as following.