A late entrant to Google's update Wednesday is Play Music. Version 5.5 has started rolling out, but don't expect huge changes. So far all we've seen is a tweak to playlist management. You can still download the APK below, if that's how you roll.
What's New (Updated with official changelog 5/2/14)
- Improved recommendations on Listen Now with the ability to dismiss items
- You can now share playlists from the app and pin subscribed playlists
- New thumbs ups are sorted by recency in the Thumbs Up playlist
- Radio improvements and bug fixes
So you have a bit more control over playlists on your device. You can change the name and description now (you could already manage the songs). If you want to share your creation (with a link), the app lets you do so via whatever means you want. The playlist has to be made public first, but the app prompts you.
The APK is signed by Google and upgrades your existing app. The cryptographic signature guarantees that the file is safe to install and was not tampered with in any way. Rather than wait for Google to push this download to your devices, which can take days, download and install it just like any other APK.
File name: com.google.android.music-5.5.1509O.1140258.apk.
Version: 5.5.1509O.1140258 (Android 2.2+).