Like Siamese twins, the iPod and iTunes go hand-in-hand. This week’s iPod update, then brought a whole new version of iTunes, v10, with a new logo and a few new features.

During their event today in San Francisco, Apple announce iTunes 10, the latest version of their music software. But they also introduced a big new feature in the app — Ping. A social network for music.

It’s like “Facebook and Twitter meet iTunes,” Jobs says. “But it’s not Facebook, it’s not Twitter,” Jobs is quick to note —