I agree that graphicly it would look more artistic/realistic if a cover was slightly larger (so you could glimpse the inside covers surrounding the page as you read).
I'm just curious if this might be doable if just applied to the first/last page when stiff="true" is selected. (paperbacks don't do this, but bound books do).
The logic would only have to be applied to the first and last page, maybe stretched slightly, so you wouldn't need to think about transparency etc.
Or somehow in the xml a seperate<cover> tag so it becomes <book><cover><chapter><page>
(just encouragement for a realistic look, not a demand!)
Megazine is really fantastic Florian.
edit: just to have a look at Florian, i don't know if this would be easy or not... http://www.flipcity.com/fvx/demos/1/flipviewerxpress.html
(open the Asian Geographic to the middle page)
At the sides of the book the pages become marginally less wide each time, giving a good depth effect.
The same effect added at the page bottom is not needed (it looks fake), but the sides look good as this is what it does look like when you read (and it has the added bonus of being able to act as a navigation element)
Anyway, food for thought.