In a quick of a flash.. hey presto! - it's windows
In the latest version of Leopard 10.5, you can now switch very fast between Mac OSX and Windows! No restarting to use Bootcamp! Just select "Switch to Windows" from OS X, and your machine goes to sleep. Wake it up and you appear in Windows. You can do the same thing once in Windows to switch back to OSX. VERY VERY NICE feature, no reason to use virtualization.. at least.
