Shopping Cart Community

Would like to know what this one is worth to the market. It will allow a shop owner to have product shipped by amazon fulfillment. It provides the shipping rate in real time. It is already created. Thoughts? What is the best way to get people to beta test it and then convert it over to a paid module...

[Split from Royal Mail Advanced thread]
Does this push the shipping information to the company? Or does it have to be manually sent?