Twitter drops SMS alerts

Social networking site Twitter has stopped delivering updates by text message. The company has been paying for delivering updates itself and says the success of the service means it can no longer afford to keep paying. Quite simply, users who sent a single message to Twitter could have it forwarded to a number of users. Twitter has text deals with networks in Canada, India and the United States but doesn't yet have cost-effective relationships with networks in other countries. [Twitter blog]