The Taskforce could provide a wiki like page for community groups and government agencies to register their interests/assets in Public Sector Information.
For example, potential datasources that aren't published openly could be identified and against them, potential applications could be defined. Community groups could define what kind of PSI they already use, what kinds of data they would like to use and how they could improve the utility/quality of that information.
This would make it easier to see at a glance the potential benefits of opening PSI and what value is being lost by restricting PSI.

Social Web