I'd really like to find a tool that could sync the virtual machine I'm using between my macbook and imac. Ideally not copying the whole file every time it changes. (Macbook is an air model, and so would have a lot of trouble doing this via WIFI) I use Dropbox, which could do the job, but has a monthly fee for files over 2gb, which is hard to justify when I use the virtual machine so rarely. I looked into FolderShare/Windows Live Sync, but it can only handle files up to 4gb. I'd like to be able to have a 10-15gb virtual machine. Looking forward to hearing your ideas.