The screenshot you see above is a screenshot of the new Facebook Question feature. This feature allows you to ask a question and have your friends or anyone else with a Facebook account to vote on an answer. In other words it is pretty much a poll.
You can ask a question by clicking the "Question" button right next to the "Status" button above the "What's on your mind?" box. After you answer to a poll, a message telling others which question and the answer you chose will be posted on your wall and be shared with your friends or anyone else you allow to see your Facebook wall.
If above instructions didn't make sense, I have created a little video showing you how it works.
I think this is a wonderful feature. :) Now if they will let us directly link to the polls... Or embed the polls. That would be great.