Client Virtualization in Microsoft Lync 2010

Microsoft has released the Client Virtualization in Microsoft Lync 2010 document - July 2012
You can get it here

Microsoft Office Communications Server 2007 R2 Group Chat: July 2012

Microsoft released Office Communications Server 2007 R2 Group Chat Server/Client v3.5.6907.258
Se Server description in KB2728998 and download from here
Se Client description in KB2735021 and download from here

Updates for Microsoft Lync 2010 for Android: June 2012

Microsoft released an update for Microsoft Lync 2010 for Android, v4.0.5324.3000
See description in KB2716895 and download from here