As you may know, I work in a rural legal services office that covers seven counties. Often, I will have domestic relations clients who live in other counties, and we may have troubles finding places to do visitation exchanges. Of course, some of them get very serious that the exchange must be exactly halfway - "Why should I pay extra gas to drive father?" is often asked.
One of the problems with Google Maps is that it doesn't show you the halfway point automatically. So, lately, I've been using MeetWays to help. MeetWays not only shows you the halfway point, but it will also identify nearby shopping and dining areas, which make great location to do exchanges. And the best part: it's free.