Now that CDF allows us to do most of the "core" stuff when we want to build a dashboard for pentaho, we can aim some steps higher; We're working heavily on allowing users to iterate with the data; In my view, the ideal BI system is not a static application but a place where several users are able to discuss the information to make additional question and draw conclusions.
We just built a new component for CDF that allows users to make comments on a dashboard. Without any additional configuration needed, it stores the comments in the hibernate database of pentaho (gotta love pentaho's customization abilities!) making them persistent.
This will be available in the next CDF version (or trunk, for the ones that use it)