I'm also taking advantage of VMWare to run Windows, but my goal is to reduce its footprint in my network, not increase it. For example, one VM is being prepared to only process documents with Office 2007 and Acrobat Professional. It's available via Remote Desktop and will never be used to access the Internet for anything other than software/security updates. Yes, the security of this system is hanging on a policy decision, but more secure and pleasurable environments are available in my network for web surfing and email (mainly Linux and OS X), so this isn't a burden at all. In fact, it's a welcome relief, since I can now archive images of the VM to restore whenever a software upgrade disrupts Windows (the main incentive for this move). There's no reason the same can't be done in a lot of environments using thin/fat linux clients and a Windows Terminal Server. Even nontechnical users can browse locally on Linux with Firefox and click an icon to run a Remote Desktop client for Windows-only tasks.