One of my coworkers just told me that a new FAQ dated April 2012 just came out, and it’s available here. For this most part, there are no new surprises, but it does do a great job of clarifying things in detail. There is a whole section on FPP, and you already know my thoughts on that – just stay away from FPP when trying to do hosted virtual desktops.
This document also clarifies using Windows Server licenses as desktops (many have tried to do this) as well as Service Provider options and issues around Client Hypervisors. Definitely a good read.