We relaunched this site about a month ago and a lot of pages are still not being picked up by Bing/Yahoo. Here's an example http://www.creativeleather.com/cat/34/chairs-and-barstools/modern Would anyone have an idea as to why Google would index but not Bing/Yahoo? Approved sitemaps have been submitted to Bing and Yahoo.
Yahoo Site Explorer definitely shows the page, so it has been indexed, just not shown in their search results. I would suggest you build a few links to the page. You have a similar page /cat/33/chairs-and-barstools/ indexed and shown in their serps. Maybe their algo considers these two pages as identical and only shows one in serps.
All of search engines have there different type of algorithm to index pages. Creating more backlinks could be help you to get index faster. After create backlinks ping it through web ping services.
It seems as if Bing is piggy-backing off of Google's search results, so maybe they don't have time to spider your site when they are consumed b all of Googles data centers. http://searchengineland.com/google-bing-is-cheating-copying-our-search-results-62914