Passed today, was a very fair exam. There were some things on there that I hadn't come across in the material that I used to study, but those could have been beta questions, so I don't know whether or not that had an impact on my score.
Materials used: MS Press 70-680 (with the errata novella), Don Poulton's book, Gibson's 685/686 book, along with his W7 Portable Command Guide. I also spent quite a bit of time labbing deployment.
My advice for anyone taking this exam (sounds obvious, but somehow I managed to screw it up) is to spend equal amounts of time on each objective. I spent the vast majority of my study time on deployment because I kept hearing about how many people struggle with that. In hindsight, I realize I shouldn't have focused on that to the exclusion of the other objectives. I full barred deployment and a couple other areas but fell short on the details with some of the monitoring tools

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Anyway, good luck to all taking this.