I've summarized the key points of the text for you in a neutral and interesting paragraph: Startup Weekend DC was an exciting event where 55 startups pitched their ideas on Friday night, and 11 teams were formed to work on prototypes over the weekend. The event featured a live coding demonstration by the author, which inspired several pitches, including one for SMS-based two-factor authentication. Despite some initial setbacks, such as discovering that another team had already built a competing product, the author's team was able to form and complete a project within 24 hours. The final pitches showcased impressive projects, including mobile apps, voice-powered sleep logs, and online payment solutions, demonstrating the potential of Startup Weekend DC. Overall, the event was a great learning experience for the author, who highly recommends attending a Startup Weekend near you.