Ok, this is a very minor suggestion -- but I'll make it just the same -- it seems to me it might be more useful to list "# of comments" on the various front pages, rather than the "# of replies" to a question. A question can have 3 direct replies but 15 comments. This is the way most other message boards work.
The rationale behind this is that it would be fairly easy to figure out if there were more responses to a thread you already read. Often all of the good stuff in a thread is a reply-to-a-reply, which doesn't show up in the main counts. So it's a little hard to tell if there is anything new on a thread without opening it up again...which would increase server load (marginally).