We’ve known what’s new in iTunes 9.2 for a while, but now the update is finally officially available for download. It basically prepares you for iPhone 4 and iOS 4 while bringing some bug fixes and PDF support.

As a review, here’s what Apple says is new in this update:

• 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