Who was accepted into Y Combinator’s Summer 2013 batch?
My answer to Who was accepted into Y Combinator’s Summer 2013 batch? on Quora
You are unlikely to get any good answers to this question for a while, because YC startups are advised not to announce their participation straight away. Instead, they usually hold the announcement until they are ready to launch something—it’s a useful hook for getting extra coverage for the story.
Expect a flurry of announcements a week or two before demo day, though!