Here in Ohio, we routinely use APRS in support of large, logistically complex public service events. If you are not already involved in similar activities in your own local area, you may wish to offer your APRS talents to deserving organizations. To give you some ideas on possible approaches, there is a short narrated APRS slide presentation addressing the 8-day, 3000 rider Great Ohio Bicycle Adventure (GOBA), using APRSISce and OpenStreetMaps:
http://w8kvk.com/GOBA-APRSI would be interested in comments or success stories from others of you who have used APRS in public service or emergency communications projects. 73/ted W8KVK - Athens OH