Thanks Jason!

I saw in Beta1, one of my wishes came true.

The device reconciliation thingy (once you enable it) for registration.

So I tested it (just like I've done in the past with previous beta builds):

1) Take a vmware workstation and snapshot the base OS (no ZCM on it ever).
2) Install ZAA agent. Let it register and show up in the zone.

3) Now "pretend" the drive died on it, so I revert back to the previous snapshot (ie, a Real pc would have a toasted hard drive, and get a brand new drive with a clean OS install, so it would not have a Image safe thingy on it).

4) Install ZAA again.

No more duplicate machines with big hairy GUID's anymore!