CEO Dorsey on Twitter's 140-character limit: "It's staying"

Over a couple of months after there were rumors that Twitter is doing away with its 140-character limit for tweets, CEO Jack Dorsey has cleared the air by saying that the limit isn't going anywhere."It's staying," Dorsey said today on the NBC Today Show. "It's a good constraint for us and it allows for of-the-moment brevity."For those who aren't aware, reports from publications including the Wall