Office Communications Server 2007 R2 on Windows Server 2008 R2

Check Supportability is available for Office Communications Server 2007 R2 member server role on a Windows Server 2008 R2 operating system

HD Video in Office Communicator 2007 R2

Clive Graven has a great article on Microsoft|TechNet about HD Video in OCS 2007 R2

Update Rollup 3 for Exchange Server 2007 Service Pack 2

Microsoft has released Update Rollup 3 for Exchange Server 2007 Service Pack 2
See info about the update here and download from here

Unified Communications Phones and Peripherals Datasheet v030410

Microsoft released v030410 of the Unified Communications Phones and Peripherals Datasheet, you can get it here

Microsoft Office Communications Server 2007 R2 Design Guide

Microsoft released the Microsoft Office Communications Server 2007 R2 Design Guide, you can get it here

Microsoft Exchange Server 2010 Update Rollup 2

Microsoft released the Update Rollup 2 for Exchange Server 2010. You can get it here

Polycom® CX300

Jason Tuck and Alex Darrow has written a great article about the Polycom® CX300 device on the Office Communicator Team Blog