Found in a recent press release from ESRI:
Students in colleges, universities, and K–12 schools throughout the United States now have access to Community Analyst through the Esri Educational Site License program at no additional cost.
Community Analyst includes demographic, health, economic, education, and business data for the entire United States, allowing students to study individual neighborhoods within their own communities or compare their communities with others. Because Community Analyst is completely hosted in the cloud by Esri, it eliminates the need for software installation and data management and ensures that students always have access to the latest features and data updates.
Existing educational site license holders should contact the Esri Site License administrator at their institutions for instructions on accessing Community Analyst.
Please note that licensing details are not yet available. Please stay tuned for more information. Community Analyst requires ArcGIS 10.