I've been using the Mac Virtual Drive - nice piece of work guys - I think when you release this in GA it is going to be awesome !
Just a tip, the drive works really well from the Mac terminal. In fact you can even use rsync. To do this:
rsync -avx --progress /Volumes/Macintosh\ HD/Users/<username>/d<path to doc> /Volumes/SMEFileSystemRW/<path to destination folder>
You need to ensure the destination folder is created before you do the resync though.