With UnRealBook, you have an option to use Ipad's camera to take picture of your music sheets and convert it to PDF directly to UnRealBook. I found this feature very handy.
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Jim

SD90,Korg I3, KMA Liverpool,TC Helicon Play Electric, Fender Sonoran Guitar, vArranger, Bose S1 Pros, Bose L1 Compact, Aiwa Exos-9