That's AdPods looking intersting...
Anyway about the aStores, I don't think it's not a good tool but if you build you own store with some amazon associate scripts you can get better result and make your store SEO friendly.
look for example at this store
Math.com Store: The Place to Shop for Math Supplies
it's a complete amazon store on a big portal useing an amazon associate script.
that's why I think there's better alternative to get better result
what do you think?