is there a way to get more room between products on the product listing pages (and in search results)

product listings
http://airtightvideo.com/shopping_ca...=index&cPath=1

and search results
http://airtightvideo.com/shopping_ca...=camera+hunter

if the search results dont work enter <camera hunter> in the search box and the search results come back the same as products on the product listing pages (like if you click on a category it brings you to a product listing page)
If it were regular html I would add a couple of <br><br> to add some space between products.

thanks for any help