[robryan]

What they need is a licensing clause that requires anyone which uses one of these Project Gutenberg formatted ebooks as a base must display a link to the free version.

That way someone can decide if they wish to pay the price for the value add that amazon is providing (presumably convenience) or just go with the free copy.

Without this kind of attribution, many would believe they are either paying for amazons work to format the book or even the book itself (not sure they acknowledge when a work is out of copyright?)