With ebook readers like the Nook, Sony Reader, Astek PocketPro, and others moving towards supporting the same content types, including ADE, I am starting to wonder if the Amazon Kindle can continue to stand alone with proprietary content. I am thankful for the Kindle because it drove down new books to a reasonable price and showed others how you could wirelessly browse for and purchase books. Others have now surpassed the Kindle with WiFi and 3G wireless access, the ability to share books across platforms, the ability to read ebooks across platforms, and the ability to let you read unlimited ebooks through your local library system for free. Everyone, but Amazon, seems to be standardizing on ADE PDF and EPUB file formats for a cross platform experience.