Phwaaar!, fellow MVP and all round really good guy, Ronald Beekelaar has created a lab walkthrough for Server and Domain Isolation in a VHD.  Nice work Ron!

Download the Server and Domain Isolation Demo

The walktrough is a 22 page paper, supplied with VMs, scripts and a very sleek HTA interface.  You get to choose between two different demonstration scenarios, Basic and Advanced.

The Basic demo shows just Domain Isolation and Server Isolation — and the Advanced demo includes No Fallback Group Isolation, Boundary Group Isolation and Encryption Group Isolation.

Anyway download the Server and Domain Isolation Demo and check it out.