Collaboration and a whole bunch of other stuff. BTW I work @ Cisco Systems.
This is a great comparison chart I found recently in the new Lync Server 2010 Virtualization documentation. If you ever wanted to have a guide for server scaling for Physical versus Virtual this is a great chart for that.
As a Dell employee I think your blog about Lync Server 2010 Physical Versus Virtual is very informative. The comparison is surely useful for us. Thanks for sharing this information.