The OpenVBX Developer Contest is an ongoing challenge for developers to create the best OpenVBX plugin, with a grand prize of a netbook and $100 in developer credit from Twilio. The contest aims to encourage developers to try Twilio or OpenVBX for different use cases, industries, and integrations, and to showcase their skills by providing helpful materials such as screencasts and blog posts. To get started, developers can check out the Plugin API documentation and Applet Quickstart, and join the Twilio developer community hub for inspiration and best practices.