I have just added a new article to my website:
APRS - Putting ham radio on the map.
It's quite a long article, but do read it if you have the time. I hope that it will explain what APRS is for to the many people who don't seem to understand, and even more I hope it will encourage more people to try it.
If you like the article and think that it will help to spread the word about APRS, please post links to it anywhere you think would be appropriate.