I believe its because there was a TED talk about the Smart Bird posted a few days ago [1]. So now all the US media talks about it.
[1] http://www.youtube.com/watch?v=Fg_JcKSHUtQ&feature=chann...
[1] http://www.youtube.com/watch?v=Fg_JcKSHUtQ&feature=chann...
Proof that having a good HN headline matters!