In CS 14 and the new not yet released Live Messenger IM between O”CS” and MSN / Live is like today, but Audio and Video will be supported as well between Live messenger and OCS.
Then the user experience will be like a full Unified solution, this will be a great add on to Microsoft Unified Communication because there is x million MSN/Live users out there all ready, and a lot of minor company’s is using Live messenger as there Presence and IM tool.
I am on the CS 14 and the new Live messenger “dog food” internally in Microsoft, it’s very nice and it’s working 
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