What a vapid article. There are a couple interesting people on the list, but there is still no true justification for why I'd want to waste my mental real-estate on them on a regular basis. For example, I really like Guy Kawasaki, but not enough that I want to follow everything he has to say about everything every single day. And having Scoble in your list is a good way to be the recipient of an unending flood of content. And why you would give Dane Cook or Ashton Kutcher three second of time, combined, I have no idea.
In fact, this "article" seems counter-intuitive to the entire point behind Google+.