Some of my readers might know that Yahoo has sued Facebook for patent infringement. Here's an interesting article from the excellent LoTempio Law Blog. It discusses Facebook's answer that Yahoo is infringing 10 of Facebook's patents.
I found this article particularly useful since it has links to the ten patents (on Google Patents) that are the subject of Facebook's counterclaim. Those of you wondering what an effective software patent in the social media field might look like, should find them interesting reading.
While software patents are traditionally quite controversial, we should not lose sight of the fact that they can be extremely valuable. I wonder what FB would pay for a key patent right now?