A new version of Windows Live Messenger has leaked to the web, version 8.5, some of the changes noticeable on this version are the following:
_ New interface: Windows Live Messenger 8.5 presents a GUI clearly influenced by Windows Vista.
_ A new installer: program which invites you to try other Windows Live services such as Windows Live Search or the Windows Live Toolbar.
_ Strengthen security: Windows Live Messenger has started to integrate with Windows Live One Care.
Bellow is a screenshot of the leaked version provided by Messengeradictos.com:
UPDATE: Microsoft has now made this public and you can get it HERE