There's an unbelievably wide array of uses for mapping software - probably more than I'd want to list here. One of things that keeps me interested in working with GIS is that there is so much cross over in the types of data that you can intermingle. For our dispatch system, we've been looking at cell phone coverage models overlayed on our proprietary routes to analyse issues with service on the driver hand helds. With our vehicles moving all over the place in hundreds of urban markets, I've wondered why the company hasn't been approached to TEST the accuracy or integrity of their coverage. I guess phone companies have an interest in protecting their ability to sell their service...