iTunes 9 Home Sharing allows you to copy music within iTunes between your various authorized computers
This is a killer feature I've wanted for a while. I have my laptop, which is my primary computer. I have my desktop, for photography, video, serious stuff. And I have a Mac Mini hooked up to my TV, with all my media. Transferring content between these machines was a pain, until now.
Simply login with your iTunes account on your various machines (you probably already have), and you can now see and stream the music from other machines, AND COPY the music just by dragging it over. This is all inside iTunes, super simple.
This also means I can authorize my account on Kate's computer and we can share music easily. And even iPhone apps. And in theory, I could temporarily authorize any friend on my wifi network and share music with them.
This is just one of many new features in iTunes 9. Some of the other cool features are iTunes LP, app organization, and a totally new UI for the store. Overall today's announcements were a bit of a letdown. The new Nano is sweet, but the iPod Touch really needed a camera...
