This is the general problem of listening to a million people. Maybe a HN-like or a Slashdot-like software solution would let one delegate the filtering to the c

This is the general problem of listening to a million people. Maybe a HN-like or a Slashdot-like software solution would let one delegate the filtering to the community itself? There's also UserVoice who claim that they solve this problem, but I am not sure how well they perform.