Very nice hack - thanks. I'm using 3.1 on the Kindle 3 - wifi and it works a charm. I am listening to a uni lecture right now. I have also tested out the dictaphone app with this - noice, very useful when studying. I have created a text file with all the shortcuts just in case I forget
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PS - the rotate hack is also wicked hot when reading pdfs. That was such a PITA.