The winner of the Twitter + Twilio mashup contest is Shane Jones with his 140Call application, which combines the power of Twilio and Twitter to send reminder and wake-up calls to mobile phones. Using a simple tweet, users can set up a call that includes weather forecasts or custom messages, making it easier to stay organized and on track. The application was built in just over a week using PHP, the Zend Studio IDE, and the Twilio PHP Library, with additional features such as integration with Google's Weather API. Jones plans to expand his app with new features, including flight status and stock updates, and is encouraging developers to explore the potential of the Twilio platform.