Daniel Miessler described an interesting application of the Workstation-as-a-Service (now you know what WAAS stands for ;) cloud service (formerly known as virtual desktop): enterprise network will have to protect their workstations against browser-based attacks and the best approach is to virtualize the browsers and isolate them in a sandbox behind a firewall.

Virtualization, virtual desktops and other security-related cloud services are described in my Next-generation IP Services workshop.