Here are a few of my thoughts on this camera so far. It is incredibly fast, I love the new battery life, I love the new battery information indicator, I love the images at ISO 3200, I love the lighter weight, and I love the large buffer. There are some things I am scratching my head over, such as the default location of the new rear autofocus button. I feel that extended use of this button will cause sever thumb strains (not an issue, as you can reassign the AF button some place else).
I am planning on posting all of my configurations for all to see, with short explanations of each selection other than the default settings.