If you were ever wondering why the new Nook Touch has the light built in, this video might answer your question. Mike Cane pointed me at a proof of concept video on Twitter. The hacker ripped apart his wife's Nook Touch so he could use the built in battery to power the Brookstone LED light.
While this might seem like an extreme measure for such a cheap device, he did it because his wife read enough in the evenings that she kept running down the batteries that came with the light. Powering the LED light off of the rechargeable LiOn inside the Nook Touch was really the best option.
One of these days we're going to look back on the pre front light era with a sense of nostalgia. Then we'll find videos like this and be glad it's over.