Once You're Lucky, Twice You're Good is the story of the entrepreneurs who learned their lesson from the Internet bust of 2000 and in recent years have created groundbreaking new Web companies. The second iteration of the dot-coms, dubbed Web 2.0, is all about bringing people together. Social networking sites such as Facebook and MySpace unite friends online; YouTube lets anyone post videos for the world to see; Digg allows Internet users to vote on the most relevant news of the day; Six Apart sells software that enables bloggers to post their viewpoints online; and Slide helps people customize their virtual selves.

Business reporter Sarah Lacy brings to light the entire Web 2.0 scene: the wide-eyed but wary entrepreneurs, the hated venture capitalists, the bloggers fueling the hype, the programmers coding through the night, the twenty-something millionaires, and the Internet "fan boys" eager for all the promises to come true.