You know have the capability to take your Pages documents and export them to the epub format. Check out my comments here and what Apple says about their update. You can also check out their comments about using Pages and the epub format restrictions. The epub format is primarily used for novels and heavy text, but if you are looking for keeping your graphics then the PDF format is for you.
One down, may more features to go. September 1st anyone?
Update 1: Floating objects in Pages are not supported in the update, you have to have all objects “Inline” with the text.