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.

As expected, Microsoft has added 20 new Web Activities for integration with your network on Windows Live Home. This has taken the total number of Web Activities to 30.

Microsoft has started rolling out the new Web Slice feature for Windows Live Home (http://home.live.com) worldwide. Last week, LiveSide reported on this upcoming new feature of Windows Live Home which shows the top three(by default) most recent happenings from your “What’s new with your network”.