Twilio is launching a contest for developers who integrate its Presence feature into their applications. The grand prize is an 11-inch MacBook Air, while contestants can also earn bonus points for using Twilio Connect and submitting to the App Gallery. To participate, developers must submit their entry by October 30th, use Twilio Presence in their app, and ensure it has not previously won a Twilio developer contest. The contest aims to incentivize developers to build something awesome with Twilio-powered technology.