Mobile technologies

I was thrilled to learn that fellow MIT-ians took the top prize at the Google competition to develop software for the Android platform. It's a very cool application that got me thinking. It would be fantastic to have an application that will look at my to-do lists, and use the GPS feature to figure out where I am, and prompt me to complete certain tasks from my to-do lists, based on my location, time of day and due dates. A mobile version of Remember the Milk, so to speak, but smarter in doing automatic location based planning. If you know of an already existing application that will do this, please let me know, I could really use one!