I just got a Sony 300 for Christmas and have been looking for toys for it. LOL I came across a company called M Edge and they make nice covers and lights for all models of ereaders. Have you heard of them at all?
I've been tempted to buy one but haven't decided yet. I'm waiting for better color options for the cases. I do like the look of their light though. I'm using my Mighty Brite booklight for now but may get the M Edge stuff one day.
I too got a chuckle out of the flashlight in the mouth suggestion. I actually did LOL.
The headlamp isn't a bad idea but you'll blind someone with it when you look up at them.