A few notes:
- When I click on an item thumbnail on your sample list page, it takes me directly to the image hosted on S3. Having the image appear in a lightbox would ensure that users are kept on the page.
- The title tag for every page reads "List of Things for Sale". I would populate the title tag with the name of the user (e.g. "Matthias McGregor's List of Things for Sale")
- Add FB/Twitter/Email to Friend links, which would provide three one-click marketing channels for users to share their for-sale items with their immediate network.
- Populate the page with Facebook Open Graph metadata. That way if users want to post a link to their store on Facebook, they'll get a nice link description and thumbnail automatically.
- I like the single-page experience, but I can't help wondering if it would be better if the app would generate discrete pages for each item users are selling. This might make it easier for users to share each item discretely, instead of just point people towards a single store page.
Really nice work!