More than 40 percent of IT decision makers across government and corporate sectors have rolled out Web 2.0 tools in their companies, but more than half of them may be hesitant to adopt such applications because of concerns about proper usage and security. According to a new survey of business and government organizations by CDW Corp., 31 percent worry that Web 2.0 will be used for personal use over work, 28 percent are concerned about information security, and 27 percent worry about employees wasting time.