'It's all about greed!" hissed the lady next to me in the airport lounge, when Martha Stewart came on TV. Martha was chopping cabbage and ducking the tough questions. "I want to focus on my salad," she said. "I will be exonerated from all this ridiculousness."Blondenfreude is in the air. (Blondenfreude, a term I did not coin, is the wish to see fair-haired uber-females get their comeuppance). Talk-show hosts are cracking jokes about how to decorate a jail cell.But Martha's merely a handy poster girl for market manipulation. All she did was tell a teeny-weeny lie and get caught out....