iTunes 10.5 is available now. With 10.5, iTunes has moved over to the Cloud or rather iCloud. With iTunes in the Cloud, many of your new iTunes Store purchases are instantly available on all your computers and iOS devices, not just the one you used to make the purchase. Many of your previous purchases are also available.
Here’s how it works: The iTunes Store automatically stores your purchases in iCloud. iCloud immediately downloads your new purchases to any or all of your computers and devices. You can also add items to any of your computers and devices any time you’re connected to the Internet, without having to sync or use Home Sharing. With iTunes in the Cloud, your iTunes Store purchases can always be available on all your computers and devices—wirelessly and without syncing.
AirPlay lets you stream music throughout your whole house — wirelessly. AirPlay wireless technology is integrated into many speaker docks, AV receivers, and stereo systems. So you can enjoy your entire iTunes library. Every song and every playlist. In any room, anytime.
iTunes 10.5 can be downloaded by starting iTunes and check for updates. It will be downloaded to your Mac or PC. You can then sync it with your iPad, iPhone, iPod and enjoy the iTunes in the Cloud.
One more thing …the new iTunes software will also bring support for iTunes Match — Apple’s cloud-based music service (the service will launch later this month).