Is elevation / altitude data available?
Sometimes just for "how cool is that" use, but sometimes for dealing with "when I get to nnnn meters / feet the motor goes sour" problems, altitude (or elevation - different name, same data) is very useful. Apps that overlay data (speed, distance, etc.) benefit from having it, too. Is it even available? Being able to display altitude in the bar would be a good idea if the data's even available.