@geekmaster: Yep, I'm already doing it ASAP (~2s after opening a book), low priority (nice 15), and the processed covers are of course cached
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On the superres front, I'm only vaguely familiar with those from the few similar things used in some SNES/PSX emulators. I was under the impression that they could only do 'fixed' rescaling (ie. 2x, 3x, 4x, etc.) which would be completely unsuitable here
. On a more general note, I'm not a big fan of those on 'real' stuff. It works wonders on pixel-art, but I'm really not a fan of the 'feel' it gives to photographs or landscapes
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