This document provides an overview of visualizing software ecosystems. It begins with an agenda and definitions of ecosystems and industry platforms. Examples of mobile payment, cloud computing, and telematics ecosystems are described. The methodology used to generate ecosystem visualizations is explained, including identifying companies, relationships, and attributes. Semantics are assigned to visualize firms by size, shape and color and relationships by thickness and color. The document concludes with findings on charting your own ecosystem and considering strategic moves.