Microsoft Office Communications Server 2007 R2, Unified Communications Managed API 2.0 Core Redist 64-bit: May 2010

Microsoft released a update for Microsoft Office Communications Server 2007 R2, Unified Communications Managed API 2.0 Core v6907.202

See description in KB982614 and download from here

Microsoft Office Communications Server 2007 R2 Group Chat Client, April 2010

Microsoft released Office Communications Server 2007 R2 Group Chat Client v3.5.6907.198

Se description in KB980043 and download from here

Microsoft Office Communications Server 2007 R2 Group Chat Server, April 2010

Microsoft released Office Communications Server 2007 R2 Group Chat Server v3.5.6907.198
Se description in KB980042 and KB982128 download from here

Microsoft Communicator Mobile for Nokia in Nokia’s Ovi Store

Microsoft and Nokia released Microsoft Communicator Mobile for Nokia devices
Read about it here, and get it from Ovi Store

Microsoft Office Communicator 2007, May 2010

Microsoft released Microsoft Office Communicator 2007 Client v2.0.6362.188

Se description in KB974599 and download from here

Microsoft Office Communications Server 2007 R2 Documentation v1.5

Microsoft updated the Office Communications Server 2007 R2 documentation. Download it here

Voicemail: A story of unrealized potential

Read about Exchange 2010's Unified Messaging capabilities here