With the S90 the ACR 5.6 preview covers more image than actually opens in Camera Raw. It does however now match the JPG image when shooting both. It would be nice to have the extra available as an option without having to through the DNG tricks.
With the S90 the Adobe Standard Camera Profile seems to process the image considerably lighter than the JPG or the other camera profiles. I don't see this with the 5D Mk-II.