I'm not a *specialist* for bing, but you are welcome to ask questions.
a test i've made about a year ago, comparing some factors in bing and google, I arrived to these results for bing:
put more focus on number of links rather than quality
more focus on domain name and urls - this is very important.
meta title
domain age
on page less less important than off page (comparing to google).
what bing is not falling for like google:
blogs
wikipedia links
less capable than google in of identifying synonyms
hope that this will help, if you have any other Qs hit me up.
Thanks, I really appreciate your answer.. For backlinks, so you said we must focus on number not on quality, but I read somewhere else that we supposed to focus on quality, based on your experience, what kind of backlinks is recognizable by Bing? is it from directory submission, article submission, forum, blog comment, social bookmarking or anything else?