This Plugin is realy great but two things we are missing.

Create and Restore Snapshot:
If you build a software a do tests on a virtual machine which is created and configured for special test scenario it would be ver useful to store and restore this state "before test"
Every test will change the machines setup an therefore potentialy danger the result of the following turn.
If you could save the state before euting the deploy-test turn, than run it and the restore to begin, the machine state wouldn't change.

I think the only vmware feature that will do it is snapshots. In our experience it it not good to have many snapshots, so if a snaphot is created there shall be a way to remove another (or even all) or "overwrite" one, not to get performance issues.

System lines:
A distributed tier architecture has more than one machine the application is installed and tested on (web server, application sever, database, que server ..) . So it is nececarry to create and restore not only one machine per build, but all of them as a bundle.