Amazon has plans to change its royalty schedule for publishers beginning this summer, doing a 180 on its 70-30 split. There are rules a’plenty, but it’s a clear pre-emptive move in the face of Apple’s possible launch of a tablet-based device. Apple is said to be willing to offer publishers a split that more resembles a 70-30 split than the original Amazon model. Amazon’s next move? Maybe some change in supporting Adobe DRM? Anything is possible.