When opting for communication studies as a basis to integrate existing traditions of diffusion research, Rogers (1962) had fed the complex field of research with a rich set of theoretical and methodological approaches. Today, diffusion research is struggling again to meet the complexity of innovations and their uses namely in the field of new information and communication technologies. Hence, a realignment to recent progresses of communication studies and neighboring disciplines is recommended. The chapter demonstrates how the traditionally one directional and binary concepts of diffusion and adoption can be complemented by a closer look at implementation as a process of personal and social appropriation. While Rice and Rogers (1980) concede that users reinvent innovations in the course of implementation, scholars have since neglected this point to the profit of ever more elaborated models for predicting individual adoption decisions (Theory of Planned Behavior, Technology Acceptance Model, etc.) and social processes of diffusion (Social Network Analysis). The chapter discusses how to overcome these drawbacks by combining adoption and diffusion approaches with traditions that permit to consider the implementation of innovations as a dynamic, multidimensional process.