In 2009, nearly one in two businesses will make use of enterprise 2.0 software, a staggering number given that the application of social software to employee collaboration and productivity goals is just three years old. However, few firms are currently taking a holistic approach to their deployments and employee access remains low. Given that we're in the midst of a deep global recession, where will the money for enterprise 2.0 initiatives come from? Forrester recommends technology marketers emphasize cost savings throughout the business, tie into other IT initiatives, and embrace the most popular use cases for enterprise 2.0 software in 2009.