Spark, collect, rank, and compel discussion for an assortment of web-content from Flickr to YouTube with communuityCOUNTS, either here or on your own site. Say you're a blogger running an art contest. Collect entries from the web; then embed a widget for readers to vote them up or down.
Better yet, say you're a journalist trying to arrange a Q&A with some hard-to-reach public figure or figures. Let the community link to or write their own questions. Then vote on which ones to ask. Build enough support around a set of questions, and they can be awfully hard to ignore. But don't stop there. Hold respondents accountable, and compel real answers by having your audience weigh in on replies. Let them decide, "Was that a real answer?"
Or maybe you just want help choosing a photo for the family newsletter. It's up to you, and it's all about leveraging your community's voice, be it for fun or fundamental change.