The follow-up to: The Knack, a web app, story.

Related: <a href="http://news.ycombinator.com/item?id=3024147" rel="nofollow">http://news.ycombinator.com/item?id=3024147</a> <a href="http://news.ycombinator.com/item?id=3036347" rel="nofollow">http://news.ycombinator.com/item?id=3036347</a>