I've just read about a new GPS app that sounds very interesting.
Called MyWay, it's been developed by the Swiss Federation for the Blind, and supposedly works like Loadstone on Nokia phones.
It is described as a GPS orientation aid which provides distance and directional information to a selected point of interest. These might include an address from your address book or a point on a self-defined route.
The paid version allows file exchange via the iTunes filesharing option. There, you can also import files containing nodes in Open Street Map format giving access to hundreds of POI in the proximity such as bus stops or restaurants.
Be sure to let us know what you think of this new app. It certainly sounds very exciting.