Glad to announce that in addition to a more clean and clear user interface with some explanation of how it works, #MastoBrainz now uses Mastodon's OAuth, so there's no need to manually generate your authentication token!
If you listen to #music and use #ListenBrainz (if you don't, you should) MastoBrainz will display the last song you listened to on your #Mastodon profile.
It's really easy to set up if you use a #Spotify account, and you'll get more statistics on the music you're listening to!