With the pending release of the iPad, Apple will have outgrown again its iTunes software yet. According to MacRumors, however, iTunes 9.1 is reduced at the same time as the launch iPad launch this Saturday. The launch will bring some changes to the iTunes Store categories, improving its functionality Genius mix, and change around the interface management device.
 
With 9.1, the “Audiobooks” subtitle on the iTunes Store will be absorbed into a new source category, “Books”, presumably catering to the iBooks app on the iPad. He also mentions that the books MacRumors (and other) may begin to display content that meets the capacity of devices connected iPad, iPod, or iPhone, in hopes of making content management smoother. There was no mention of what the newspaper and magazine covers Apple no doubt hopes to reduce the (perhaps not so aptly named) category Books.

iTunes 9.1 is also planned to reorganize some of the management interface for devices, such as moving the “Check for updates” and “Restore” button on the left. Users can also automatically convert songs to 128 kbps AAC when they sync the songs to their devices, a feature currently available to only the iPod shuffle. The format change is intended to help users squeeze more stuff on their players while the files remain in their original format on your computer.
 
Genius Mixes are also getting a couple tweaks to make them easier to organize: users will be able to rename them, rearrange them by dragging, and delete them through a right-click. Geniuses Mixes may also be newly available for play via the iTunes DJ.