I've had a couple of situations where a question I've asked has had more than one great answer - when it comes to accepting answers, it makes it hard to chose. Is there any chance of adding a feature to accept more than one answer? So often in SQL, "it depends" so more than one answer *could* be right
It seems unlikely to be honest - the framework the site runs on is designed for the exact opposite situation, highlighting one answer to a specific problem. You can still vote up multiple answers so that they score highly, but the idea behind the Q&A style is to present information quickly without much discussion. This is *absolutely* not the best fit for all questions, but it should serve a lot well.