There is a Kindle Web App now. Pretty nice. If you definitely like Kindle, you'll want both the App and the Web App. Going forward, the Kindle App will likely be the thing you use to keep a repository of Kindle books you already bought. The Web App allows you to store some of your books on the iPad, but you'll have completely free in-app access to the Kindle store and everything, while you're connected. A pretty keen thing Kindle did, recently. Allows them to stay out of the App Store marketplace, while still providing an app for the device.