I liked the section where he considered stepping back and expanding to different subjects. Reputation and voting systems have added so much to our culture--it s

I liked the section where he considered stepping back and expanding to different subjects. Reputation and voting systems have added so much to our culture--it seems like a principal advantage of the Web. Google, Twitter, StackOverflow all reward it. I don't think this has ever happened with Email or Usenet... but wow, imagine that. If Gmail could see which mailing list posts had been starred by other readers, it would save a ton of time.