Folders, one of the “jailbreak” tweaks, called categories, that Apple has added to the new iOS is a welcome addition. But in the previous beta releases of the the new firmwares, iTunes has not been able to sync these folders.
Now iTunes beta 9.2 for developers adds folder syncing for iOS4. Now when using iTunes to sync your apps, you can actually create and manage your folders on your iOS4 enabled device. You can add, rename, remove and re- order the folders and then sync to your device, all from iTunes.