Google's newest tool called "Moderator", released on their own App Engine platform, lets people ask (and vote) on questions related to any given topic. It's easy to get started, or participate in existing "series" (which contain groups of topics) -- just click on "create series" on the main page, and follow the steps.
This newly launched service was actually developed for internal purposes by Google. It was so they could tell what the majority of people wanted to ask during presentations -- instead of answering every question that came in. That's not all it can be used for though -- it's great for tapping into the wisdom of crowds to figure out answers to questions.
To test it out, I've created a topic called "Google's next big thing" in which I ask you submit your ideas, or vote on others. Let's try and figure out together what is coming up next from Google. Click here to submit your ideas, and vote on others.