You have a whole lot of neat informative pages that are hard to find unless you see a link in support or the like, such as the stats.bml page. A sitemap with all of these things would be really cool, not to mention useful.
It seems obvious. Happier users :) More informed users.
It would take time and bandwidth I suppose.
Really could be done with simple HTML and a link on the sidebar. Could get fancy and have it dynamically update itself whenever an informative page like stats.bml or /dev/s2 is updated.