By Jim Karpen
At yesterday's event from Apple, perhaps the most unanticipated announcement was Ping, the main new feature of iTunes 10, which is now available for download via iTunes or the Apple website. Steve Jobs described Ping as a cross between Twitter, Facebook, and iTunes. You can read more about in on the Ping website or in the New York Times. Ping lets you connect with your friends and see what music they're listening to or buying.