In Microsoft Patent Deal, Facebook Delivers Another Smackdown to Yahoo - Kara Swisher - News - AllThingsD

Also see Google-related dimensions in Microsoft and Facebook Align Further With Patent Deal (NYT)

"But with the latest deal with Microsoft, it is clear that Facebook is more likely to continue its hard line against Yahoo and less likely to settle as quickly and pay up to get Yahoo’s patent portfolio, too.
“They tried to shake us down,” said one person close to the situation. “And we don’t appreciate that.”
Not to be outdone, Yahoo took yet another oh-yeah tough stance today in a statement to me, after news of the Facebook-Microsoft deal was out:
“Nothing about today’s action changes the fact that Facebook continues to infringe our patents. Companies who purchase patents are often working from a position of weakness and take these actions to strengthen their portfolio. We see today’s announcement as a validation of our case against Facebook.”"

In Microsoft Patent Deal, Facebook Delivers Another Smackdown to Yahoo - Kara Swisher - News - AllThingsD