Tropo Mashing up Demo
Tropo is a developer platform for all things communication. You can see the mashing up demo and try their Python Web API library.
Moveable Weather is a free web app with Tropo, for people to call a special phone number and get their local wether read to them. They can then hop in the car, drive 500 miles down the highway, call the same number, and get the updated wether. Tropo provides the Python Web API library for developers to work with Google App Engine.
Original message is at The Tropo Blog.