See part 8, and in particular the third paragraph:
http://www.paulgraham.com/really.html
It makes me wince for HN to see so many people upvoting the parent. It's not just the meanness of it; it's that it's both mean and wrong. Surely at this point everyone is at least familiar with the strategy of launching something minimal and then expanding it. And yet here is a startup doing exactly the right thing, and they have a mob jeering at them.