Would it be useful to put up a list of items that are on the wishlist in the form of a poll? That way people who can’t be bothered, or don’t know how to leave a point of view, might manage to just click the items they are interested in. You would need to make sure folk only vote once, and probably allow them to revise their vote.
Polls are generally limited to a single “choice”; for a wishlist survey we’d want to allow people to order by priority or select their “Top 3” or something like that.
We probably will do some kind of survey, probably via a web form.