then you just run vmware player which is available for free ... and you're running a machine within a machine ... to be honest the speed should be acceptable assuming you've a semi decent machine with a gb or 2 of memory
This way you can switch to a virtual machine ... go full screen ... run a webserver in this machine if you want .. deploy to it ... and so on ...
You can also get server versions of these VM's that are extremely handy for running things like subversion (but it all depends what you want to use for version control on your websites)
OK ... I'm rambling I should get a coffee and wake up properly