TechCrunch | Y Combinator S12 Demo Day, Batch Three: Dreamforge, BigCalc, Tracksby, And ... TechCrunch We're still here at the Computer History Museum in Mountain View, California watching Demo Day for Y Combinator's Summer 2012 class, the storied incubator's biggest yet. Today's 75 presentations have been broken up into five batches, with the fifth ... |