During the campaign Barack Obama at least implied that he wouldn’t indulge in the age-old practice of giving cushy ambassadorial posts to big campaign donors. Now that he’s in power, of course, it’s another story. He named retired Citigroup executive Louis Susman (a $500,000 donor) our ambassador to Britain. Former financial analyst Charles Rivkin (who donated $100,000- 200,000) will be our man in Paris. And biotech lawyer John Roos (a $500,000+ donor) will be heading to Tokyo.