Apple released iTunes 9.2 recently with lots of new features including iOS 4 compatibility. According to Apple’s release notes, iTunes 9.2 includes support for iPhone 4 and iOS 4, as well as the ability to organize and sync books to iPhones and iPod touch units with iBooks 1.1, support for iBooks PDF management, the ability to create and manage iOS 4 home screen folders from within iTunes, album art speed improvements, and faster backups when syncing a device running iOS 4. iTunes

Some Features of iTunes 9.2 :

• Syncing iTunes content with iPhone 4.
• Syncing and reading e-books (with iBooks 1.1 installed).
• Syncing PDF documents as books.
• Utilizing new folders feature for organizing apps.
• Faster syncing.

You can download iTunes 9.2 via Software Update and at Official Apple website for both Macs and PCs.