Followers: 1.1 million
Sample tweet: "Heading to Japan, worried about protecting my team from radiation. Any advice out there?"
Emmy Award–winning 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.