How about a FAQ page.
You know, for those questions that you know are going to come up every few weeks/months, like?
How does the ranking system work?
What does "bump" mean?
Why do PM'* stay in the out box?
And, of course .....what does SE/SLE/SSE/SSEi stand for?
I am sure there are others I am forgetting.
Anyways, just a thought.