Free Mac OS X

In light of the Windows 7 + Free XP Virtual Machine, perhaps a decent approach for Mac OS X would be to offer up a 90 day virtual machine of the operating system. Perhaps, limited to Virtualbox as a single image download.

I bring this up as the opportunity to "test drive" Mac OS X for a specific period of time AND have the full functionality of that operating system during the specified time period would allow those, like myself, the chance to go further than the local Mac store for interacting with the OS.

Basically, hook me with the freebie... otherwise, will I ever REALLY know what I am missing but not having Mac OS X?