MSN8.1 Version: 8.1.0178.
(Now the MSN8.5 has released,You can get it here)
Updates from 8.0 include:
* Yahoo interoperability - now you can chat to your Yahoo Messenger friends from Windows Live Messenger
* Your display name, status and personalization roam with you to any computer
* Improved sign-in performance
* Redesigned contact cards
* A bonus of 2 free VOIP calls
* And it runs on Windows Vista!