The increasing use of agile methods to develop UI-intensive systems has led to a need to find ways of integrating usability into agile teams—reconciling the convergence and divergent points between the two areas. Agile usability researchers at Virginia Tech have partnered with Meridium to develop and implement an integrated approach known as eXtreme Scenario-based Design (XSBD). Based on an analysis of core values and principles of both areas, and work from other agile usability researchers we identified four requirements that need to be met for an integrated approach to work effectively.