Two new features have just been added to the Ping service integrated into iTunes. The first is to create and share playlists with different contacts. The second allows you to discover your followers on the network Twitter all of your activity on Ping.
So your followers will be able to discover your “Likes”, your comments on your purchases of songs or albums, etc. Note that it is not yet possible to connect your Twitter account directly from iOS. Everything is happening right now from iTunes (computer version).
We discuss it on the forum.