The full story can be read here: [law.com
Cross Atlantic Capital Partners are using patent #6,519,629: System for creating a community for users with common interests to interact in
[google.com] to sue Facebook.
I havn't fully read the patent in detail, yet everything I've seen in a skim read seems to cover really basic ideas that anyone could (and is likely to) think of.
The patent was filed for on Oct 2, 2001. It seems to me that even a generic forums system should be covered by this patent, and yet forums have been around for a lot longer than this patent, so really it should be thrown out on prior use?