The devil is in the details, and the details of the Yahoo-Google search advertising deal reveal the desperate, possibly neurotic state of Yahoo these days. Quite simply, it looks to me like Yahoo is effectively paying Google off to step in and (1) keep Jerry Yang, Sue Decker and the current board of directors in power, and (2) avoid a desperation deal with Microsoft for as long as possible, or longer. It’s not even clear to me that Google wants this deal, based on the terms. It almost looks like they’re just doing Yahoo a favor, and trying to keep them out of Microsoft’s hands.