Tomorrow, Amazon is going to lift the lid on its not-so-top secret smartphone project, answering questions like why? and how will six cameras and a 3D screen help you sell more books? Before the big reveal, however, The Wall Street Journal is reporting that ATT has already signed a deal to become the exclusive home of the handset. ATT signing an exclusive deal for a smartphone being developed by a website? Lets hope whatever comes, we dont see another HTC First or HTC Status…