I've had this up in a browser tab since Sunday - haven't managed to blog it yet.  Amazon has it at http://www.amazon.com/Expert-NET-Micro-Framework/dp/159059973X/ref=sr_1_1?ie=UTF8&s=books&qid=1207137527&sr=8-1, and if you're on the fence about it you can get a sample chapter at Introducing the .NET Micro Framework Base Class Library

It looks like a great companion to to the MS Press book on the Micro Framework - http://www.amazon.com/Embedded-Programming-Microsoft-Micro-Framework/dp/0735623651/ref=pd_sim_b_title_1/002-0759219-3236018  Now I have to put together another order.