Data-centered collaboration on emerging cyberinfrastructures is expected to revolutionize science and engineering. Many experts predict grids of geographically distributed mass storage, high-end computers,and visualization platforms connected via high-speed networks will let scientistsand engineers collaborate remotely. They envision a new era of integrated massive data from distributed, diverse resources that will help researchers achieve data-driven discovery and problem solving across multiple spatiotemporal scales and traditional discipline boundaries. Datasharing and collaboration on cyberinfrastructures also will democratize science and engineering by diversifying participation from broader institutions and communities.