This chapter looks at security and privacy concerns of virtual worlds by investigating the use and capabilities of current and emerging technologies such as gaming, blogging, podcasting, virtual meetings, and virtual worlds. Security and privacy concerns will be investigated in the context of exploits and IT-related security risks, access management and confidentiality, reputation and product risk management, resource management, financial considerations and accountability, and safety. Several technologies and personal practices are reviewed, as well as ways to mitigate or eliminate their associated risks. The core principles of information security -confidentiality, integrity, and availability - provide an overall framework for the chapter.