NPR has a great idea. Take pictures of the audience at congressional hearings and ask your readers to identify those in the audience. They did it at a Senate hearing on health reform two weeks ago and its interesting to see who are the lobbyists in the room. Unfortunately I haven’t seen any new persons identified since the page went up. For crowdsourcing to work you need a critical mass, and they probably don’t have it. If you’re a DC denizen, take a look and see if you spot someone familiar.