Corporate Twitter for Large Enterprises

Yammer is Twitter with a business model. Created by an existing company, Geni, to scratch its own itch, Yammer takes the familiar Twitter messaging system and applies it to internal corporate communications. There is such a huge demand for this type of service that 10,000 people and 2,000 organizations signed up for the service the first day it launched on Monday. Anyone with a corporate email can sign up and follow other people in their company. But if a company wants to claim its users, and gain administrative control over them, they will have to pay. It’s a brilliant business model.