Twitter's Blackout: Bad for Business

«Starbucks, IBM, and other companies rely on Twitter to reach customers. The site's outage could encourage them to speed up implementation of backup plans.
Pitching products and talking to customers on Twitter has become so easy for companies, many may forget how they ever did without it. They got a sharp reminder on Aug. 6, when a hacking attack on the microblogging site left users around the world unable to access Twitter for much of the day. »
BusinessWeek