First, YES, you are right, the exam will be changing in July 2011.
The content is more streamlined but more in depth. They have done away with nursing diagnoses and nursing procedures (for the most part), however, now the focus will be more on A&P and patho and more "medical" type presentation.
The weight of each category will vary just a bit, but be fairly similar.
I WOULD NOT count on any currently published materials to give a comprehensive view of the new blueprint. It would be at your own risk.
Most current CEN review courses are starting to teach the 2011 blueprint (interesting, they are teaching something they haven't seen yet!)
I personally plan on taking the exam as soon as it's available (I take it every year) so I can see what's on it. I'll be re-writing my review courses to mirror the new exam content.
For now, I'm still teaching the current blueprint, but telling people that they need to test before July! I can't guarantee their suceess after July 1.
If you really want to see if you're close; take one of the ENA's practice exams (online) and see how you score. Matter of fact, if you want, you can send me your score report, and I can help you analyze it as well as come up with a personalized study plan to maximize your time you're going to spend. For Example, theres no need to spend even one second on psych/social content even if you get onl;y 50% right - psych/social only counts for 7 questions on the current exam, HOWEVER, if you get 50% on NEURO - you need to spend a LOT of time on that as there are nearly 3 times as many NEURO questions than psych-social questions. It's all about using your time EFFECTIVELY!
If I can do ANYTHING to help you or advise you, please let me know.