This paper describes the iterative development of a visualization for a wiki used in a large enterprise to manage research projects. An initial prototype-based field study exposed two main usage problems and provided five design ideas, which led to the development of an interactive visualization called CherryTree. The paper describes CherryTree, discusses the reactions of users, and discusses future directions for this work. Keywords Social Computing, Visualization, Wiki ACM Classification Keywords H5.m. Information interfaces and presentation (e.g., HCI): Group and organizational Interface.