yes, i would be very interested by these figures as well, since it's true for now we are only speculating.
just one point though about the layout process, if they are using Adobe Indesign apparently you can now export directly to ePub, which should facilitate the creation of ebooks parallel to the print books considerably. if they are using Quark, they should switch to Indesign anyway (sorry, i really hate Quark, it's a personal preference. i'll stop now).
and i heartily second what Taylor said about DRM. *seriously* now ; we all hate it, and plus we have to pay for it, and as we all agree it won't stop anyone from making copies, if they really want to. just get rid of it, please ! and then reduce the prices.