A change that I would love to see to the forums, is an option for moderators and other people of notable reputation (Or even the topic creator), to be able to mark a question topic as answered, so you can know to check the topic if you have that same question, as well as maybe highlight the post that has the correct answer, by making that post have a green outline.
This would not lock the topic, but it would just be a great way to organize that section a little better.