Ok, here's what I'm trying to accomplish. When a customer is browsing through my store, he could see the items just fine, but the thumbnails were just too small. I eventually found the answer to this problem by tweaking the value of Themes>[currenttheme]>Catalog Pages>Attribute>Product Picture Width.
Problem is, the thumbnails for the new/popular/spotlight items remain the same size. The object is to make the thumbnails bigger so the the customer can read the product before clicking on it. If a customer wanted to see the bigger thumbnails, he would have to select a category first. This is not ideal.
Additionally, since the store layout is set to Vertical, the larger thumbnails now overlap with the product information. Anyone know how to shrink the bounding box for the product info?