Our forum membership stands at 467. So if every member joined because they like the show, and because iTunes and the podcast are free, that should be 400+ total ratings and comments. This is an untapped resource. You have to convince everyone who doesn't have iTunes to download from the apple site (it's completely free), subscribe to and rate the podcast with 5 stars, and that's all it takes to help out.
The problem being that even if there are 400+ members, not all of them use the American itunes store.