Many factors make Bing SEO different. Since Bing doesn't crawl as many pages as Google, they are more harsh on low quality sites and links coming from "content farms". Specifically, Bing is:

- Less likely to find results in forums

- Harsher on results from “content mills” (even after Panda)

- Less likely to give you ranking for a keyword if is not found verbatim in the page

- Also provides way fewer results for phone number queries

I don't know of anyone who specifically optimizes for Bing - most of the ranking signals are the same or at least similar to Google, so with far less traffic than G it's not worth it to focus on bing SEO (or for bing to change their algorithm to include widely disparate ranking signals)

Bing picks crap sites seemingly at random already anyway, so there is no SE to try to O.