Suspending VMWare Fusion instance that uses Boot Camp partition?
I know that Parallels 6 can 'pause' the boot camp partition. It suspends the virtual machine and frees up system resources without actually suspending the machine i.e. hibernation, however I don't know of any hack/workaround for VMWare Fusion.

Also Parallels can suspend the machine very quickly (around 5 seconds) so you can quit the app freeing up resources. I use it quite a lot as my computing class requires Windows.


  Pausing a Virtual Machine
  Pausing a virtual machine releases the resources, such as RAM and CPU, currently used by this virtual machine. The released resources can then be used by the host computer and its applications or by other virtual machines running on the host computer.


Hope this helps.