The wow effect - Gabriel Weinberg's Blog: "There is a startup proverb that says you have to be 10x better than your competition to get people to switch. A related one is that you should concentrate on being a painkiller as opposed to a vitamin"
Redis: "Redis is an open source, advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets."