Theres this great site our client team has been working on. Its called Talking About Windows and features a number of people from the engineering and product management teams talking about the Windows 7 development process and associated products that tie into it.
I did my bit for it nearly 6 months ago now, shortly after we had RTM'd Advanced Group Policy Management 4.0. In it I talk about GP, the stuff we consider in GP and AGPM. I also talk what mechanisms we are now using to hear from customers.
Check it out!