Many of the most successful Web 2.0 companies, including MySpace, YouTube, eBay and Twitter are prime examples of what journalist Adam Penenberg calls a "viral loop" –– to use it, you have to spread it. All kinds of businesses –– from the smallest start-ups to nonprofit organizations to the biggest multinational corporations –– can use the paradigm-busting power of viral loops to enable their business through technology. Viral Loop is a must read for any entrepreneur or business interested in uncorking viral loops to benefit their bottom line.