Google really doesn't get that lots of people want a separation between their public and private spaces. I wouldn't be comfortable putting my files on anything

Google really doesn't get that lots of people want a separation between their public and private spaces. I wouldn't be comfortable putting my files on anything connected to Google+ and I would be more than a little creeped out to see my files appear in a Google Search. Even it's 100% secure it's just not a good idea to blur the lines. I think part of the success of Dropbox is it becomes an extension of your private space in the form of an Explorer or Finder window.