Facebook is trying to raise the user interaction, without letting the language barrier stand in the way, proposing to translate your friends status updates from any foreign language it is in to English.
This will with no doubts boost bing translate service, that before this integration most did not know about.
The cooperation between Microsoft and Facebook is not new, On October 24, 2007, Microsoft announced that it had purchased a 1.6% share of Facebook for $240 million, Microsoft’s purchase included rights to place international ads on Facebook.
Some aspects of this cooperation are:
The msn and skype connect to facebook option (both microsoft entities).
The Web Results when you do a facebook search.