Within each category of templates are more subcategories. Publisher 2010 displays a sampling of templates from each sub-category with a folder you can click on to view all the rest.
When you choose a template you are shown a sampling from all the sub-categories for that template.
Screenshot by J. Bear
In addition to all the pre-designed templates there are a selection of blank templates as well as folders for manufacturers such as Avery. The Avery folder for greeting cards contained a blank template for the greeting card paper I ended up using for this project but I used one of the pre-designed templates instead.