I hadn't actually heard of Envoy before reading this thread, but now that I have I've checked it out and I'm very interested.
As I understand it, Envoy is a full networking package for Amiga computers which allows you to mount remote drives from other Amigas on your local desktop and use them as normal drives, as well as printer sharing between all the computers on the network. From that interpretation, I would assume it's not possible to add a PC running Windows or any other non-AmigaOS machine to the network, is that right? So for example, Envoy wouldn't allow me to add my PC to the network and share it's drives?
Other than that inconvenience, Envoy sounds like a very good and useful package.
Brian