I have just passed the 70-290, and I hit the ground running, now studying for the 70-291.
What I want to do is treat my study time the same way as I treat the test. I don't want to waste time, and I want to get it right the first time.
On to the plan...
I want to help create a framework for training for this test. Not just a study guide, but a study plan.
Example:
Books:
Microsoft Press Book 70-291.
Study Courses:
Testout Sim
and or
Real instructor led course
Practice exams:
Transcender
Testout Testsim
examsimulator
This is a barebones list, but maybe we can add to it. What helped those who passed it?
What kind of test lab should be setup?
Also I want to address specific questions, like:
Should the server be dcpromo'd with active directory integrated DNS, or should DNS be installed afterwards to make it harder? Or both?
Those who have passed it would be able to recommend what material and study habits worked best for them. Maybe it could be a sticky.

Note: This does not make the test easier in any way. You will still have to study your behind off.