Indexing backlinks in google is quite straight forward but how to index them in bing? Please note: backlinks, not the articles on my site.
You can point Web 2.0 at those bing backlinks and blast tier 2 links on those Web 2.0 that should be more than enough to index your backlinks on bing.
Build links to those links basically.. Even if it's just some dofollow blog comments or web 2.0 backlinks...get some links pointing to those and they will get found.