I can't believe amazon's short-sightedness in forcing you to stop offering this app 2 years ago.
I wonder if it isn't time to revisit the topic with amazon? By now, perhaps they've realized they have little to gain in getting your app disabled. As a happy Bruji customer and a heavy amazon customer, it sure looks like a win-win to me.
Perhaps Barnes and Noble or some non-US chain (such as Canada's Chapters bookseller chain)
I also have an amazon-related feature request (syncing with my amazon wish-list); I'll post that in your feature request forum.
Here are some other apps to looks at:
Here are some other big booksellers in the Anglosphere that might be more receptive to teaming:
- Chapters Indigo (Canada)
Borders (U.S.) - currently in bankrupcty proceedings but likely to survive
Powell's (U.S) - not a chain but very large
Dymocks Booksellers (Aus/NZ)
Here some used bookseller, bookfinder or book review sites to consider:
For DVDs, consider teaming with Netflix, IMDB or Blockbuster.