Apple has released iTunes 9.2, which plays nicely with iOS 4 and the iPhone 4 as well. Once iOS 4 is released in under a week, you should see much faster backups and syncing, among these other new features:

• Sync with iPhone 4 to enjoy your favorite music, movies, TV shows, books and more on-the-go
• Sync and read books with iPhone or iPod touch with iOS 4 and iBooks 1.1
• Organize and sync PDF documents as books. Read PDFs with iBooks 1.1 on iPad and any iPhone or iPod touch with iOS 4
• Organize your apps on your iOS 4 home screens into folders using iTunes
• Faster back-ups while syncing an iPhone or iPod touch with iOS 4
• Album artwork improvements make artwork appear more quickly when exploring your library

You can download iTunes 9.2 now.