Apple just released a new version of iTunes for Mac and PC that makes some much-needed changes to how the company integrates its social network Ping into the application. Until now, not only was Ping somewhat hidden in iTunes, but you could also only really interact with it from within the iTunes store and not from within your iTunes library. Unless your friends are compulsive music shoppers, chances are that few of them ever went through the store to mark their favorite songs. Now, however, in the new version of iTunes (10.0.1), you can very easily like songs right from within your music library and you can choose to see a sidebar with the latest activity from your Ping friends while browsing your library. Chances are that this will raise the activity level on Ping, though it remains to be seen if this will be a dramatic change.