Topics created by developers.
It is very apparent that players can fill a forum full of ideas.
I feel its best if developers started some topics worth discussing.
For example:
100,000 players want new maps. The development team then decides that new maps are required. A member of the development team then posts that new maps are to be generated, and although a fundamental idea is already under way, they would like read about ideas specific to their agenda.
The post don't have to be from lead designers or management. I am sure we would love to hear from the guy who just draws mustaches for Lalafells.