The update (available only via Software Update when this story was posted) adds support for iPad syncing. If you’re one of the lucky ones getting your hands on a shiny new iPad, you should be able to sync music, movies, TV shows, books—and more, according to the release notes—to your Mac or PC right away.

iTunes 9.1 also brings the iPod’s shuffle’s option to create 128-kbps AAC files on the fly when syncing to iPhones, other iPod, and (presumably) iPads; plus, it cleans up the Summary page for connected devices.

The update also adds organization and sync for iBooks, though the iBookstore is not yet available for your perusal. iTunes also now lets you rename, rearrange, and remove your Genius Mixes.

The company is meanwhile highlighting a list of all-time bestselling singles, predominantly controlled by recent mass-market acts like the Black Eyed Peas, Lady GaGa and Katy Perry. Topping the chart is the Peas’ “I Gotta Feeling.” The rankings may be dictated less by genuine popularity than the coincidence of certain songs’ debuts with the growth of iTunes, the iPod and the iPhone.

Prices for the bundles start at $10 to $15 for two films and rise up to $35 for as many as four films. The X-Men Quadrilogy, for example, runs $30 as a bundle, instead of $45 if purchased individually. While you can find most of these titles for much less at discount DVD stores, you still can’t beat the convenience of digital downloads. No HandBrake required.

Amid all the hype around iTunes 9 was one new instrumental feature for iPhone owners — app management. We were thrilled by the possibilities of finally being able to organize and manage our apps via iTunes, and now we’re even more impressed by the reality.

After toying with the new feature, we can officially say that the iTunes 9 application management features are fantastic. Gone are the days of painstakingly moving apps one-by-one on our iPhones. Today we welcome effortless drag and drop app management and syncing, and here we’ll walk you through how to create application harmony between iTunes and your iPhone.