Automatic/Central Question Sorting
Stack Overflow, and the ever expanding Stack Exchange, are two sides of the same coin in that Stack Overflow is like an instance of a Stack Exchange.
As setup, a user will navigate to their instance of preference, be it the math.stackexchange.com, ux.stackexchange, history.stackexchange (, etc.), and then either choose to review and answer a question, peruse around, or pose a question of their own.
Although a majority of content on these exchanges is in the answers, the true source of content generation is from properly posed and targeted questions. Question posing is highly regulated on StackExchange and there is a really good format that is enforced and for the most part followed.
However, the targeting of the questions leaves something to be desired in my opinion. I would
request a questions.stackexchange.com where a user could go and pose a question. No tags, and no specific exchange. At that point, other users could then work to decide which exchange would be best for the question, and which tags should accompany the question. In addition, comments could be provided to improve the quality of the question, and perhaps answers could be provided as to how to improve the question at hand. Or, perhaps answers could be provided with the tags and exchange, and then the selected answer would be where the question ended up.
Although some of the specifics for the feature would need to be examined by the StackExchange team, I think there is a lot of value in making a more generic method for users to pose questions - especially considering the growth potential of the very awesome model that StackExchange operates on.