AS FINANCIAL WORLD COLLAPSES, AT LEAST WE'VE GOT MARGARET BRENNAN TO TELL US ABOUT IT: Your editor has a really hard time watching any cable news at all, ever, as you may have heard once or twice. So it is a Great Relief that Bloomberg has a teevee news channel we can monitor in the "news mix" DirecTV thing, and that Margaret Brennan is usually on-air when we have to briefly watch the morning news to find out about the new wars/Senate votes/oil disasters/Great Depression. How does she know so much about every business and government on Earth? And why isn't she terribly obnoxious and wrong like Jim Cramer or whoever?