Big business is beginning to move its money around again. In just the past couple of weeks, Comcast has bought the remaining stake in NBC Universal from General Electric. With all that newfound cash, GE is buying back stock and upping its dividends to shareholders. Warren Buffett has bought the world’s largest ketchup stash; US Airways and American Airlines have agreed to merge. Meanwhile, Apple, so far an exception to this rule, is sitting on $137 billion but has been sued by a hedge-fund operator who wants more and better dividends.