I'm noticing a lack of Android-ness with the Amazon apps. For example:<p>I just downloaded the Amazon store on my Nexus One and started downloading Angry Birds Rio. The first thing I noticed is that, while downloading, there's no ongoing notification like the Android Market has. If I navigate away from the Amazon Appstore there's no indication I'm still downloading anything at all. There was also no notification when it finished downloading; I had to manually re-open the Amazon Appstore, then it gave me the standard "installing an app" screen.<p>Even though I have the Amazon Kindle app installed and syncing, Amazon hasn't set up an entry in the Android "Accounts" list, as the official Twitter and Facebook apps have.<p>Also, the "menu" widgets are non-standard. This may seem like a minor quibble, but it just adds to the "We're Amazon, we do things our own way" vibe I'm getting.<p>I still plan on occasionally using the Amazon Appstore, and I can't speak to the "test apps in your browser" functionality yet, but I can't see it replacing the Android Market long-term.