How is the sidebar being added to your forum? In that file is where you will need to add content to your sidebar.
What theme are you using? If you’re using Kakumei or similar – you can add your code to front-page.php, in the section that lists your tags (heat map)
No, I am using the static blue theme. Do you know if it will work there as well?
In case anyone is wondering, here is the theme:
http://www.awesomestyles.com/bbpress-themes/view/static-blue-bb
Yes, it would go in front-page.php inside the div where the hot tags are.
Find this: <div id="hottags" role="main">
Put it right BEFORE the closing </div>
That should take care of it