With the impending release of the iOS 4 operating system scheduled for Monday and the iPhone 4 set to follow shortly thereafter, Apple has released another relatively minor iTunes update—iTunes 9.2—to provide support for its new touchscreen software and hardware. iTunes 9.2 is the first to offer compatibility with the new iOS and iPhone 4 devices, as well as supporting its upcoming iBooks 1.1 application, which synchronizes ePub- and PDF-format…