Microsoft Lync Server 2010 is now available on MSDN, TechNet and as 180 day trial

Lync™ Server 2010 ushers in a new connected experience transforming communication into an interaction that is more collaborative, engaging, and accessible from virtually any location with internet connectivity. A single interface unites voice, IM, audio-, video-, and web-conferencing into a richer, more contextual offering, and a single identity makes it easier and more efficient for users to find contacts, check their availability, and connect with them. Lync Server 2010 works consistently with Microsoft Office, enriching the experience of familiar applications like Microsoft Outlook, Microsoft Word, Microsoft SharePoint, and more.

Need more information? See the product details page.

See also:

NextHop - Microsoft Lync Server Team Blog

Microsoft Lync Forums