My good friend Boris did something yesterday I've been toying with for a while.
He experimented with taking photos, GPS and his cellphone. You can read all about it on Boris's blog.
It truly is amazing what you can do with technology today compared to a few years ago. As usual Boris does an excellent job of explaining his experiment and although some of it necessitates geeky stuff, he keeps that to a minimum.
GPS bluetooth boxes are getting cheaper and I was thinking not only about the cellphone but an old Palm T5 I don't use anymore. At one point I was thinking about this idea for the car, but given I'm likely to be driving less often than before, maybe it's an investment that can 'wait' for now!