The product people behind the application say they re-tooled the design to match the Fire's 7-inch, 1, 024 x 600 screen (and also, the tablet's heavily skinned UI, based on Android).

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From the new Shin Megami Tensei X Fire Emblem cross-over, to the announcement of two new Zelda games (well, one new one and an HD remake of Wind Waker) the Nintendo goodies just keep dropping.

FORBES: Connect

The X-Ray feature that premiered on the Kindle Fire is also available on the Paperwhite.

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Internally, the device is called the Kindle SD as it now plays second-fiddle to a pair of Kindle Fire HD devices with 1, 920 x 1, 200 displays, but will be called the "new" Kindle Fire in public.

ENGADGET: Amazon unveils new Kindle Fire with doubled RAM, 44 percent better performance and $159 price

What our man Pascal Brisset did is design a Linux system around a Gumstix Overo Fire computer-on-module, a Vuzix VR920 head-mounted stereoscopic 640 x 480 display (complete with 3D tilt sensor and 3D magnetic compass), WiFi, and Bluetooth modules -- the whole shebang resides in (and on) the eyewear, just the thing for secure telepresence and augmented reality applications (or just extra-private web browsing).

ENGADGET: Homebrew head-mounted Linux system for telepresence, looking silly

"X-Ray has been one of the most loved features on Kindle Fire HD since it launched last September, " said Peter Larsen, Vice President, Amazon Kindle.

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Investigators in Washington have taken X-rays and CT scans of the lithium-ion battery that caught fire in Boston, the safety board said.

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