This application simply rocks: Delicious Library
You can hold a book with a barcode in front of your iSight camera and it automatically gets added to a virtual book shelf (with thumbnail, price tag and summary). You can then create and export sub-collections.
I would have bought this application for $40 instantly – if only the export function would be more than a tab delimited ASCII file and the “my info” information would be more powerful.
Update: There is an extension that allows simple export to HTML. It does not seem to support custom templates and shelves though.