I just looked at the book module and it looks great.
I'm just missing one big thing:
It does not support transparent pictures.
I've tryed TIFF and PSD format, but it's still making a white background.
I'm hoping Adobe will support transparent photo's in the next version of lightroom.
Not likely, but you can submit a feature request here. http://feedback.photoshop.com/photoshop_family
Retrieving data ...