If you're excited to try out YouTube's new music subscription service, you may not have long to wait. We've gotten several tips this morning from users who now have access to YouTube Music Key on the web, though that access doesn't seem to extend to the Android app just yet. Most users seem to be left out at the moment, so it's probably another one of Google's frustrating staged rollouts.
Having the latest version of the YouTube app (5.17) installed on your phone doesn't seem to help, though at least one reader with Music Key enabled said that there were now no ads being shown during music videos. Also, the user's subscription to Google Play Music All Access (the older subscription service tied to the Play Store) had been cancelled. That's not as alarming as it seems: while he couldn't access the All Access library on the web, his Google Play Music app on his phone was unaffected. At the moment we're guessing that this is an early glitch, and that Google has encountered some problems stemming from the way the YouTube and Google Play subscriptions are being merged for current users.
If you're not seeing Music Key on your computer and/or Android device yet, just be patient. Or not. Patience doesn't seem to be an especially prevalent virtue among tech enthusiasts.