I don’t really spend a lot of time thinking about Bing. Nobody does, really. I don’t think even Microsoft employees spend a lot of time thinking about Bing.
It’s sort of like the red-headed step-child of search engines, except for the fact that red-headed step-children are sort of unique and more likely to evolve into talented stand-up comedians.
At about 15% of search share, though, Bing is relevant enough that you want to be visible. How do you make sure this happens?