Found this bit of information for adding additional content blocks. When you add this to your template, it will create an additional window when you edit a page, and the copy will be placed where you happen to have it in the template.
Example Lines From Template:
<h3>Commentary</h3>
{content block="sb_content_block" label="Sidebar Content Block"}
So, it is possible to have additional content blocks on any page, you just have to define them. The stylesheet CSS for “content” will still apply. In essence, you have created a “block” which is now saved in the database as whatever you happened to name it.