Now when you read the above link information it's clear that a product called "Microsoft Lync Server 2010" is on it's way. What could this be? I'll give you a hint....check the Microsoft web site tomorrow (September 13th, 2010).
UPDATE 1: If you type in www.microsoft.com/lync it points you to a web page (but with an error): http://www.microsoft.com/en-us/lync/default.aspx
UPDATE 2: It's official! Microsoft Lync 2010 is now on the web site http://www.microsoft.com/lync