The Citrix partner that set up this demo environment is also a Microsoft Gold Partner. The approach was to set up the whole Microsoft Enterprise VDI solution; Hyper-V, App-V, Citrix Provisioning Server, and Citrix XenDesktop.

All you need is a headset and a microphone and you can use the Office Communicator 2007 as a softphone – the really cool bit is how it integrates into Outlook and your Outlook contacts.

Source: http://www.dabcc.com/article.aspx?id=11410