Since the Area 51 Discussion Zone was launched around 10 days ago there have been 10 actual topical questions posted as discussions. Here's some examples. I think they're actual questions rather than sample questions because of their length and the fact that they're almost all asked by new users.
Maybe it would help to have an extra explanation of the purpose of Area 51 and the Discussion Zone on the "Ask Question" page, especially for new users. Something along the lines of the page new users on StackOverflow see when asking a question.