I don't consider the application any safer than any other 'backlit' device.
Amazon Announces Kindle App For iPad (click here)
05 Apr 2010
Amazon.com has announced its Kindle App for iPad now available in the App Store. The app lets users select from over 450,000 books from the Kindle Store on iPad and features Amazon Whispersync technology that saves and synchronizes customers' last page read, bookmarks, notes, and highlights across their Kindle, Kindle DX, iPhone, iPod touch, Mac, iPad, and more....