How many glow-in-the-dark books have you ever seen?
You can read the Kindle in the dark in exactly the same way as you can read any book in the dark: by switching a light on. This is possibly the most ludicrous anti-e-book argument of the lot.
No, the Kindle (and most other e-book readers) is not backlit, and many of the anti-tech brigade scoff and cite this as a failing: It really isn't. The difference in screen technology is precisely what makes arguments such as "computer screens make my eyes tired" and "you can't read it in bright sunlight" null and void. It also contributes to a significantly longer battery life than any other portable device beyond the wristwatch.