The Microsoft Advanced Group Policy Management (AGPM) 3.0 has been RTM'd. For those customers licensed for MDOP, this means you'll have it in your hands around the first week of October 2008 via the MVLS site.
Microsoft Advanced Group Policy Management (AGPM) helps you better manage Group Policy objects (GPOs) in your environment by providing change control, offline editing, and role-based delegation.
What would this tool do? It would help you better delegate who can review, edit, and deploy Group Policy objects (GPOs). It would help you prevent widespread failures that result from editing GPOs in production. You could use it to track each version of each GPO and roll back if needed or track the changes between different versions of a GPO.
AGPM is a key component of the Microsoft Desktop Optimization Pack (MDOP).