When itunes was updated with Ping, the icons on the left became gray. I saw many comment on this in forums. But I noticed something today. I was in a library with many other itunes users. I could see their libraries listed in the left hand pane of itunes. Two people decided to stream from my itunes. What I noticed was that those who were streaming had a change to their shared library icon in my itunes. The icon would change to a music note when they started playing my music. There was also a different icon for those logged in and not playing music. Previously to tell if someone was actually playing music and not just signed on, you had to look at a widget or some other application like itunes monitor. I still needed to check itunes connection monitor widget to see what song was being played by others.