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How swiftly executives fall from management's good graces at Yahoo. Just last year, Todd Teresi was promoted to run all of Yahoo's display-ad "marketplaces" — the electronic systems which gather bids from advertisers and place banners on websites, both on Yahoo and off. In May, he squired Yahoo president Sue Decker to a meeting with Dow Jones executives at the Wall Street Journal's D6 conference in May. But in this spy shot of that meeting, note how Yahoo president Sue Decker is looking away from Teresi. Could she have been planning, even then, for his exit? Teresi's likely replacement: Mike Walrath, who is moving from New York to the Bay Area. Walrath characterized his move to us as a "lifestyle" decision, not a sign of some corporate reshuffling. Having a rival out of the way does make one's life easier, that's for sure.