The document summarizes research on Wikipedia editing and participation. It finds that over time, coordination costs are increasing as direct editing decreases and more time is spent on procedures, discussions, and reverting vandalism. A model is developed to characterize article conflict based on editing metrics. The research also shows a long tail of participation follows a power law distribution and most highly active editors do not remain so long term. A proposed "WikiDashboard" aims to surface social context and metrics to help readers and writers.