I'm curious to hear other's thoughts on they think would be useful.
Please don't hold back ideas! There's very little harm positing silly or unlikely ideas, but there is some potential value (perhaps more than you realize).
Inspired in part by calebo's comment here
Evaluations-on-Demand
There have been several attempts at making public cost-effectiveness models, but they are often made by people who are working on the relevant research. For instance, organization in area X making an estimate to show that X is cost-effective.
It would be nice to have another agency agree to make their own models, or to go through existing models and check them for validity, similar to a penetration tester.