Followers: 1.1 million
Sample tweet: "Heading to Japan, worried about protecting my team from radiation. Any advice out there?"
Emmy Awardwinning broadcast journalist Ann Curry is every bit as rock-solid reliable on Twitter as she is on NBC's Today show, which she has co-anchored since 1997. Her million-plus followers don't have to wake up early to get regular updates on the news of the day. For all the fluff that floats around social networks and let's face it morning TV, Curry's authoritative voice is worth savoring in any medium.