Mr. Craig, It will be very nice if you can give an option to the user to see all the replies to a thread in one page or on seaparate pages. In the first case, u can do one thing: while scrolling the page, the topmost message i.e. the question should remain stable. Only the replies to the question should scroll. I would be very happy personally to browse through such page. But you can keep it as an option to suit everybody's needs.
Thanks for the great work you are doing....