The world economy "has stabilized somewhat" but resource constraints will linger, International Business Machines Corp. Chief Executive Samuel Palmisano said in a London speech to business and government leaders. ...http://online.wsj.com/article/SB10001424052748704586504574655002299324212.htmlSpeaking in London, IBM CEO Sam Palmisano spoke about the successes in the company's Smarter Planet initiative, which involves the increased intelligence in digital devices and using the data coll...