A website (and associated social networking thing) that on a daily basis posts a new question on twitter:
Good morning. What's your favourite cheese?— Favourite Question (@FavouriteQ) April 9, 2013
People reply directly on twitter:
@FavouriteQ the only cheese you can use to hide a horse: mascarpone— Thomas Parslow (@almostobsolete) April 9, 2013
We detect and cache all replies within 24 hours (until the next question goes out), and show daily lists of replies.
The site also has an archive section where people can look through old questions, and their answers.
People can suggest new questions at any time.