iTunes 9.1 to be released with iPad, contains eBook support, automatic bitrate conversion?

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Macrumors reports that iTunes 9.1 will be released alongside the iPad and will include a number of enhancements including:

‘Audiobooks’ section will now be ‘Books’ and contain all Book content: audio, eBook, etc compatible with the given device (iPod, iPhone, iPad)
Genius Mixes will include songs that go great together, “users will have more control over Genius [...]