I'm going to do a full debrief sometime late next week, but here are my practice test scores at least. I found this thread extremely helpful in building my confidence in the face of some mediocre 3rd party test scores so I figured that I would contribute. Now that I am done, I do firmly believe that most 3rd party tests are designed to produce lower scores than the actual tests. Hence, the 'guarantees' from test prep companies that they can improve your score. Use these tests as practice for pacing yourself but don't give too much credit to their score reports.
Listed in the order that they were attempted:
GMATPrep 1: 730 (Q48 V42)
Kaplan "Diagnostic": 680
PR Free Online: 640 (Q39 V40)
Manhattan Free Online: 720
GMATPrep 2: 740 (Q47 V44)
Actual GMAT: 760 (Q48 V46)
Interestingly, I spent most of my time trying to improve my Q, but ultimately it was an exceptionally strong V that carried the score.