Create Your Own Cloud of Ebooks with Calibre + Calibre OPDS + Dropbox

This post has been updated as of July 23, 2011.  

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Apple appears to have pushed Google out of the ebookstore.  Kobo released an updated app with no buy link.  Google is randomly deleting Google Plus accounts.  Yet another ebook format has been announced.  I'm getting pretty fed up with the powers that be who run the ebook world.  The biggest weapon that readers have in their arsenal is the ability to decouple.  This means taking your books out of the cloud (the servers of Amazon, Apple...