This one was on the board before I made all of the recent changes:
When you are looking at the list of topics in a particular forum, if you move your mouse over the topic title, the last 200 characters of the topic are displayed. Very handy.
That'll be the last mod for a little while coz I've been at it for the last few nights and need a break
But....if anyone's got any requests for stuff about the forum, post 'em here.