I only know one, which is exactly my point. You won't find many of them because that isn't the type of company YC was designed to fund. You will find more than

I only know one, which is exactly my point. You won't find many of them because that isn't the type of company YC was designed to fund. You will find more than a few companies that have raised multiple rounds of VC and are in growth mode (Justin.tv, Xobni, Scribd, Songkick, Dropbox, Loopt, etc) because those companies better match the type of company that YC naturally fits.