Pretty design, and nice concept overall but there doesn't seem to be any way to add certain kinds of information other than connecting social networking sites. I don't want to do that.
Just thinking of my own case, you won't get much of use from Facebook (I post pictures of kittens and cookie recipes), twitter (It's been nearly a year since I've tweeted anything) or Linkedin (I barely use it). You'd get more of use from HN, reddit or (especially) github, but it might be harder to extract useful information from those sources.
You could still provide buyers with awesome cookie recipes!