My issues with the Kindle have nothing to do with its light emissions. They have to do with the fact that with a Kindle you can only purchase Amazon books (this may be changing as we speak, but that is my info at the moment). This makes the provider of the machine and the provider of the books as the sole source. Ultimately this is a REALLY BAD IDEA if you care about freedom of information. In its inception it isn't much of a concern, but it does tie you to one point of view.

Personally I'm considering implementing the blackout curtain material I have (commando cloth), since I have a street light not far from my bedroom window. Apparently melatonin levels (important for good sleep) are affected by any light source present during the sleep cycle. I live in a big city and it is -Never- really dark. Having grown up on the Ranch, I know what dark is, and if I forget any trip up there will remind me.