Just noticed this… it may be old news but I found it to be pretty interesting.

Bing looks to be heavily integrating Facebook’s API’s into it’s search results. I haven’t done a search on Bing for a few weeks, but I immediately noticed that I was logged into Bing via Facebook (I was already logged into Facebook).
I can now see pages that other friends of mine liked in the serps. This is probably one of the coolest integrations of Facebook Connect I’ve seen thus far and it hits the nail on the head in terms of achieving Mark Zuckerberg’s vision for what he wanted FB Connect to be able to do.

We are quickly approaching the full integration of the social graph into our search engine results and daily routines. The promise is for more relavent, targeted, and personalized search engine results.
It is absolutely imperative that everyone interested in capitalizing on search engine traffic takes a close looks at their social strategy… not just the standard content/links SEO game.
It’s a new day. Are you ready?
For more info on this Bing integration stuff, Click