First I exported the photo book from iPhoto to a PDF by right clicking in the background of the photo book layout and choosing 'Save book as PDF". Then I created an Automator workflow to create a JPG image from each page of the PDF that went like this (just search for each command, drag it over, and select the option as indicated below):
- Get selected Finder items
- Render PDF Pages as images
- Move Finder Items (to Desktop)
- Rename Finder Items (Make Sequential)
I did have to reproduce the layout of the front and back covers in Snappish, and everything else was just as I had it in iPhoto. Of course the layout in Snappish was static and could not be tweaked, so make sure you have everything just the way you want it in iPhoto before transferring it over.
[crarko adds: I haven't completely tested this one, but the Automator workflow was pretty simple to create.]

