Dell's Tweets Bring $6.5M in Sales

"Twitter has proved to be a bit of a gold mine for Dell—the computer maker said promotions over the social-networking site directly resulted in more than $6.5 million in sales this year. The number of subscribers to Dell's Tweets has risen 23% over the last three months, to the point where 1.5 million people—as far-flung as China, Mexico, Japan, and Brazil—now follow along, reports Bloomberg."