Kai Ryssdal: This final note today. in which we go back to whence we started, Facebook buying Instagram for a billion dollars. It is, as Facebook's Mark Zuckerberg said in a blog post today, essentially a social networking deal. So it seems fair to ask social networkers what they think of it. That's what the Wall Street Journal did that today, a snap online poll. Suffice it to say Mr. Zuckerberg has some hearts and minds to convince. Check out reactions the Wall Street Journal collected on Twitter in the Storify below, and view photo reactions on Instagram here.