Hello
Just thought I would let you know I passed 70-647 this week. This now completes my MCITP:EA path. I used the MSPress book and Windows Server 2008 R2 Unleashed. Loads of lab work and on the job experience (As I have done several migrations to Windows Server 2008 R2 which have been helpful). The sticky which Earweed posted on here was also very helpful (Thank Earweed):
http://www.techexams.net/forums/mcts-mcitp-windows-2008-general/54748-70-647-resources.html
All in all I found the exam mediocre it wasn't easy but not too hard either. I managed to get an 850 pass first time (Which I am happy enough with). I would recommend anybody going for this exam to make sure you lab as much as possible. If you are just starting make sure you read a book that includes R2 and use other books without R2 to gain further info on specific areas afterwards. It is important to distinguish the differences right away. You also need to read up on other Microsoft products such as Microsoft System Center Suite and Forefront. I am not talking a huge amount of knowledge needed on these but be aware of what they are and what they do.
I am now onto Exchange 2010, 70-662 and 70-663. I am going to try and tackle them both at the same time. I have over 2 years experience with Exchange 2003, over 2 years experience with Exchange 2007, and 1 years experience with Exchange 2010. I have been on a 5 day training course for both Exchange 2007 and Exchange 2010. Now that the MCITP:EA is under my belt I can concentrate on these two exams. I have allocated myself 2 months for these as I will be going through the material and learning/labbing in the evening whilst being involved in an Exchange 2007 to Exchange 2010 upgrade project at work in our cloud solution through the day. 2 months may seem long to some of you but I am also learning Dell storage (Required since moving jobs as I came from HP storage background. Terminology is different and little things like that), and with the migration project I felt 2 months was a more realistic time frame for me, as I tend to study thoroughly as well.
Anyway best of luck to everybody out there who will be sitting this exam or is on the MCITP:EA path.