Groundswell, Expanded and Revised EditionCorporate executives struggle to harness the power of social technologies. Twitter, Facebook, blogs, and YouTube are where customers discuss products and companies, write their own news, and find their own deals. But how do you integrate these activities into your broader marketing efforts? It's an unstoppable groundswell that affects every industryyet it's still utterly foreign to most companies running things now. When consumers you've never met are