The Reason Joe Wikert Trashed His Kindle for an iPad

Worth quoting: "Sure, you can load content [for the Kindle] from sources other than Amazon, but there's really only one digital bookstore for the Kindle. The iPad offers two advantages. First, you can buy from Apple and Amazon, not just one. And second, the iPad natively supports ePub files, which are closer to an industry standard than the Kindle's mobi format."