Think also that even when the brainstorm talks about the Hildon Application Manager, major changes will come in Harmattan, where there is no Hildon and therefore the code writing starts basically from scratch.

Perhaps the lack of participation is related to the length of the brainstorm proposal? If you would basically say: "How to find the right software for you in a catalog of thousands of apps?" then people would get the idea easier and would come up with more proposals.