I was thinking it might be useful add a hyperlink onto the replies column header to sort discussions by # of replies...so the 0 replies come up first. Move the little guys to the front of the line. Not a big thing, just a thought.
I had to reply to this topic... mostly because it was ironic that it didn't have any follow-ups.
As long as you could sort the discussions in both ascending and descending order, that would seem appropriate.