WOOT! 
This was my first certification. Passed this test on my first try with an 805 after failing the Windows 7 test last summer. I found the test to be a little easier (to me) than the Windows 7 test but I also have 6 more months of experience as well.
A book I used and I definitely recommend if you're studying is
THIS one, it's a huge book, but the practice test on the CD and within each chapter are really nice. I also used the training videos on Skillsoft which helped out alot as well.
Onto the 70-688. Any tips on it??