I would consider it a real service to the community if someone could build a VMWare VM from a fresh Dapper Drake Desktop installation and Zimbra 3.1.2. Instead of posting instructions on how to do it, just make a VM. I haven't asked, but I would guess that zimbra may be willing to host it.
I realize how cheeky all this is, but thought it wouldn't hurt to ask. I'll bet there are others out there that would appreciate it too.