I want to add Brand as one of the filters, however when I do this - it also comes up as an option on the actual product. Is there a way to add the Brand information to each product and have it show up in the layered navigation without having it show up as a drop down on the product?
You can set options for attributes in the Magento admin.
Like using it for layered navigation. Also can check/uncheck if you want to show it on the productpage.
So go to Catalog / Attributes / Manage Attributes, open the attribute brand and try changing a few options.