This is, by far, the best bulletin board I have come across. It is clear, simple, uncluttered and easy to use, and it has just about all the functionality needed. In another role I have used this bulletin board as an example of how to build a successful system.
There will always be odd points that could be improved – by all means discuss them, but leave the basic structure alone. I am sure that is the will of the majority who use this board – just read the posts.