T-Mobile’s Android-based mobile phone will include a connection to Amazon’s MP3 store. From Wired’s Listening Post:
Owners of the device will be able to browse, search, preview and purchase music on the Amazon MP3 store using the phone’s cellular connection. In order for purchased MP3s to download, the phone must be connected via Wi-Fi. (The mobile iTunes store, on the other hand, remains completely offline without WiFi.)