I've started waking up in the night every now and then (last night it was easy because number one son and daughter got up at some ungodly hour to go to London). Quite often I find it hard to get back to sleep, but this is sometimes a bonus because I do have some of my better ideas at that time (or perhaps it is because my critical faculties are asleep at that time as well).
Anyhoo, last night I had a neat idea for the "Flashlight for the Fiftieth Century" (US version) or "Posh Torch" (UK version) that I'm developing as a worked example for the .NET Micro Framework book I'm presently writing. Yesterday I got a GPS interface sort of working. As I was lying in bed it occurred to me that it would be nice to add some mapping features to the software. So now I'm going to download some map images so that the device can have a "you are here" kind of display for certain areas.