Me and my co-founder submitted an app for YC W11, with a web site that would help college graduates figure out what jobs they could get with their chosen degree. We got a rejection email, and already had this as a back-up idea in case we did get rejected. So in the month between rejection and today, we found a printer, found some graphic designers, and got enough done that we felt comfortable with it as a first iteration. I know there aren't so many non-web app startups on HN, but I thought y'all might like to see how 2 guys rebounded from YC rejection.