Though I'm not sure how Alaundo feels about incorporating one. And given recent problems with the forum software and ASP errors, working on a refresh button for the forum may actually be a secondary concern for the moment.
I just hit the "Active Topics" link, myself, which does almost the same thing. Or I use the Refresh button on the toolbar up top (the IE one), or -- most often -- I simply hit my F5 button.
The "Active Topics" link and the "Refresh" button on each individual browser are the best substitutes for a forum refresh button. Most 3rd and 4th Gen GUI Browsers have the "Refresh" button nowadays, and "Active Topics" is always available for those still using text-only-based browsers.