Infinite Flight claims to be the first Flight Simulator for Windows Phone 7. The app features a realistic-looking Cessna 172SP Trainer Aircraft, interactive flight lessons, day time and weather changes and a realistic flight model.
It also has 5 camera modes and realistic sounds and many features which should make it easy for new users to jump in.
Infinitely Flight is $4.99 and can be found in Marketplace here. Unfortunately there does not appear to be a free trial.
Read more about the app and see more screen shots at infinite-flight.com.