Re: Amazon Payments for Zen-Cart? Virtuemart & Oscommerce in the works.
Somebody will work on it if they:
1. Need it
2. See the benefit/profit in doing it (getting paid)
Otherwise, people have tons of other things they need to take care of, not many have the free time to create free things for everyone else to use.
Such is life. If you really need it, hire someone to do it for you.
I no longer provide installation support on forum for all my modules. However, if there are real bugs with the modules please feel free to contact me