> Cool. So if /home becomes just a settings folder, as i would administer
> everything in /common, how big would /home really need to be?
You can put the virtual drive anywhere - your machine descriptions will
remain in you ~/.VirtualBox folder but the actual virtual disk can be
elsewhere. I use this arrangement for an office I maintain so that all
users work from a common Windows virtual disk. Couple of hitches will need
attention for such a case.
You have to make sure all users have r/w access to the common virtual
drive.
You can only have a single user running that virtual machine at one
time - I sometimes have to kill an open session some user goes home without
closing.
Getting the permissions right can be a PITA so pay attention when you set
things up.