The Startup Weekend Boston event saw over 140 attendees from various fields, including businesspeople, hackers, designers, and marketers, come together to create and pitch their startups within a 48-hour timeframe. The event culminated in the selection of 17 startups that showcased impressive products such as SubBids for construction subcontractors, BeOnTi.me for travel planning, Ottr for impromptu event planning, Whoizit for a social twist on "Guess Who?", Spea.cc for audio-based experiences, and ActivePepper for sports partnerships. The selected startups won awards in various categories, including Most Technical Achievement, Best Cloudmine Startup, Most Fun, and Audience Choice, with the overall winner being SubBids. The event was successfully organized by Josh, Casey, and Juan, and attendees could watch demos of the pitches on a recorded stream.