You'd have a tough time coming up with a more Silicon Valley institution than Y Combinator. The technology business incubator is based in Mountain View, California — about a 25-minute bike ride from Google's headquarters — where hundreds of entrepreneurs apply to get help developing their websites, apps and gadgets. The speakers list looks like a selection of Crunchies award nominees: Jack Dorsey, Mark Zuckerberg, Marc Benioff, Marissa Mayer.