Derik pointed out a thread on our forums where Tuggy introduced Wise Tasks, a no nonsense Getting Things Done app with some cool features. It offers the basic integration with tasks along with the address book and memopad. What is very interesting is that it introduces geofencing and GeoContexts. That means you can setup GeoContexts based on coordinates (Both GPS or Cell Tower location) and a radius of influence. In plain English think of “Things I need to do in this location” instead of your whole task list.
You can check out the Wise Tasks website for more detailed information or pick up the full version for $1.99 in App World. There is also a free trial version with a limitation of one project and one geocontext for you to try it out.