Menuvore is a food review site where users review and can search for specific dishes rather than restaurants. By gathering everyone's food knowledge, menuvore will be the biggest and most informative menu in the world.
Pitch an idea, form a team, make a movie. Tiny Film Festival brings together writers, actors, directors, technical editors, etc... to make a film in 2 days. At the end, there is a tiny film festival to show each team's film.
Think Farmers market but more of a party. The Underground Market opens the doors to awesome local vendors who don't produce their goods in a certified kitchen but want to share their tasty treats with the SF community.