Brands Finding Value on Twitter

Some case studies of the use of Twitter for marketing, in Clickz:

" ... It's been called a tech-geek fad, a business flop-to-be, and a waste of time for most marketers, but the fact is big name brands are on Twitter. While detractors argue brands don't even belong on the quick messaging platform, they are there -- from Ford to Dunkin' Donuts to Whole Foods. They're engaging in experiments with customer service, branding, and corporate culture-building in the decidedly public forum..."