I can’t comment on the technical architecture of Bing, but ultimately it doesn’t matter that much. Bing is trying to make solving a solved problem look new by adding a big photograph of a man standing on a mountain. Bing is b(or)ing. As Hugh MacLeod says, Microsoft: change the world or go home.
Maybe they can get some traffic by doing deals but ultimately a mousetrap is just a mousetrap unless it can do something other mousetraps can’t do. Until then I don’t see it making any waves.