One area of interest is the VMware's communication channel, which is used for:
- shared clip board
- file sharing
- time sync
Another interesting item is a deeper look at the guest's .vmx file. Just as one would add or remove items on a new server, the same holds true for a guest VM. In this case you would augment the settings within the .vmx file to limit the ability to fingerprint a VM (page 23).
Read the PDF here.