This isn't a new idea (for example, China used text messages to warn citizens about Typhoon Kaemi in 2006), nor is the wrangling around it in the U.S. new, but on Wednesday an "emergency alert via SMS" plan finally received approval by regulators.

Put on your dancing shoes and grab a wireless handset. AT&T Inc. (NYSE:T) announced today the company is teaming with ABC Television network's hit program "Dancing With the Stars" to offer viewers — for the first time — a chance to vote for their favorite couple via text messaging.