Andrei Avram brought StereoTube to the PlayBook as an easy way to listen to music on your PlayBook. It uses music videos on YouTube to create playlists for you to listen to without storing them on your device. It essentially simplifies the playlist features on YouTube with a more immersive experience. The app still has some rough edges like not reordering playlists but hopefully Avram continues improving the app!
Check out StereoTube for $3.99 in App World