There should be several single points of contact. In that when you are looking for input, you should look for input from the relevant groups, but at a single point in each of those groups.

If you want end user input then you are silly to not post such in the announcement section here. If you want developer input then you should also contact the mailing list people (or irc or wherever they gather). I only visit here so I'm not sure what the makeup of the other mediums are.

I hope this makes sense, maybe I should have marked 'Don't care'. If I'm left to feel abandoned then that's the way my feelings will drift.