Andem - 11:43 pm on Mar 13, 2012 (gmt 0)
I haven't even ever looked at the patents that Yahoo! has filed, but I would imagine there are plenty which relate to Facebook's functionality.
It's hard to say at this point whether they have any standing in this lawsuit, but I wouldn't be surprised if they did. Facebook has filed vague patents in the past and even the notion of a "feed" with any personalization seems to violate patents filed by Facebook.
Either way, the case might set precedent on vague patents.