Amazon has apparently wisened up a bit as they've now launched a new more iPhone-friendly version of their Kindle store.
Last March, Amazon released a Kindle app for the iPhone, and even though it provided iPhone users a convenient way to read their e-books on the go, purchasing additional content was a bit frustrating as it had to be done through the Mobile Safari browser.
Fast forward to the present, there’s a new more iPhone-friendly interface that allows you to browse through their massive collection of e-books that are broken down into various categories. Just update your Kindle app to the latest version and tap on the Get Books button to access this new Kindle store UI.
The links and the search box will still eventually use the Mobile Safari browser in the end, but at least the new interface makes it easier and faster for you to find the e-book you want.