As you may have heard, T-Mobile has announced the first phone running Google's Android operating system. But an OS is only as good as its applications. And while it remains to be seen whether Android has the killer apps it needs to take on Apple, Microsoft, Symbian, and RIM, the T-Mobile G1 has some pretty good ones including access to Google's mobile search, maps, Gmail, contact, calendar, and chat applications. Oh yeah, and you can watch YouTube videos and play music and movies stored on your device.

One of the most noteworthy features is access to the Amazon MP3. You can purchase DRM-free tracks from Amazon's digital music store for 89 cents, or entire albums for under $10. You need to have a WiFi connection to download songs, but you can browse the store or listen to samples using T-Mobile's wireless network.

You can check out a video of the Google Android interface after the break.

[via Engadget]