turntable.fm lets you listen to user-deejayed rooms, chat, and vote on songs.
turntable.fm takes music stream apps like Pandora and Last.fm and adds social elements. Like on the web, users can enter rooms of different genres to deejay or listen to others deejay. There is a democracy within the room and songs that get "lamed" will be skipped. DJs earn points by getting more "awesomes" and can unlock avatars with these points.
The mobile version of turntable.fm is a great application that provides most of the features found on the turntable.fm website. You can DJ, manage your queue, and chat. Unfortunately, you can't join private rooms or change your avatar within the app.
Performance of the turntable.fm application for Android is decent but it is plagued with interface quirks. turntable.fm rushed this release by directly porting the iOS version. iOS-like buttons can be found within the app, which conflicts with Google's own application style guidelines. Chat is also buggy and everything in the DJ room is tiny, making it difficult to tap on specific DJs or people in the crowd.
Overall, turntable.fm has created a faithful port of the iOS app but should have spent more time polishing and tailoring this app for Android.