The successor to the current Wave 3 version of Windows Live Messenger has finally been unveiled. Neowin has got hold of exclusive screenshots which shows off the next version of Windows Live Messenger, that is going to be the part of Windows Live Wave 4 release. The most significant change in Windows Live Messenger 2010 is the added option for “social stream” updates, which is going to retrieve all your friends updates across various network activities like facebook, twitter and blog posts, that you have added in Windows Live.