Doug Read has built a voice-enabled wedding guest book application using Twilio's Voice API. The application allows guests to call in and leave messages, which are then displayed on the website along with an audio recording of their message. Doug uses Google App Engine and Python for his website, and has found the Twilio documentation and API libraries to be helpful in building a working application quickly. He considers features such as home automation integration to be exciting possibilities for future Twilio apps. For other developers, he advises playing around with example programs and utilizing the debugger under their account to improve the developer experience. Twilio is offering Doug $50 in credit as an early wedding gift, and encourages others to share their own Twilio applications through a blog post or social media channels.