Updated (10 August 2009): Added a new screenshot.
Here's the latest verison of the Reporting Dashboard with some working charts and a more intuitive Cohort Breakdown widget.
Here's my initial version of the reporting dashboard, using JQuery's portlet library. Let me know what you think. Some of the fields (program, workflow, cohort, dataset) are populated dynamically, but there's nothing on the backend (yet) to process most of these. Writing that code will be relatively simple once I hear back that this is the right direction to take the dashboard.