Like many of our products, Questions originated as people began using Facebook in a new and unexpected way. People would update their status with a question, and their friends would answer in the comments. We saw this and began thinking about how we could make this interaction more useful. Over the summer, we began testing Questions with a small group of people, and today we are beginning to roll it out to everyone.
Questions will also enable you to cast a wider net. Now, when your friends answer one of your questions, their friends can answer it too. For more unusual questions, you can get advice from a broader group of people, but to keep it most relevant we filter the answers to show you first what your friends think. You can see more responses by clicking "others" within the question.
Once again, they are extending interaction so that friends of friends can interact with your questions.
Sounds like they are trying to race Google to be the first to make a version of "multivac" ("The Last Question" ) Asimov, but coming at it from the POV of ( "The forever wars" ) ..as opposed to influencing à la "Foundation" applied to "multivac" which is Google's way.
I set one up on a page for a locality just to try. Used the poll feature. "What is the best place for lunch in town?" I listed about eight places, put in a link in the comments to our restaurant directory in the comment, allowed comments to be posted, allowed other restaurants to be listed. (The UI allows you to delete if someone puts in a listing you do not like.)
Our FB section has not gotten a lot of traffic, but we have not pushed it. This will be a good test.