http://kb.vmware.com/kb/2005585 - This video discusses and demonstrates how you can run VMware Workstation 8 as a server with shared virtual machines.
VMware Workstation 8 introduced the ability to share your virtual machines with remote users. When you install VMware Workstation 8, virtual machine sharing and remote access are enabled by default. This feature is called VMware Workstation Server, and it starts when the host system starts.
A shared virtual machine can be accessed remotely by other instances of Workstation 8. Working remotely, you can create a new shared virtual machine, convert a standard virtual machine, or create a shared virtual machine clone of a standard virtual machine to the Server where the VMware Host Agent service manages them.
For more information, see VMware Knowledge Base article "Running VMware Workstation 8 as a server with shared virtual machines (2005585)".