The popularization of “social media” has raised questions of how and why young people use these various technologies in their daily lives. This exploratory study proposes a classification system based on Rogers’ concept of technology clusters, which posits that likelihood of adoption is based around similar perceived characteristics of a technology or medium. Results from a survey administered to 401 undergraduates at a large southern university indicated that social and non-social technology cluster use is correlated with psychological, affective, and behavioral factors (extroversion, self-disclosure, computer anxiety and self-efficacy). One particularly popular type of “many to many” social media is the social network site (SNS). MySpace members were significantly more likely to use both other many-to-many social technologies as well as one-to-many. Gender differences were also found, as MySpace members were more likely to be female, and females had significantly higher levels of extroversion and self-disclosure. Implications for future research, marketing efforts, and online safety are discussed.