Now, try adding a little bit of space between your product listings...

Put this at the bottom of your stylesheet:

Code:
.productListing-data {padding-top: 1em;}
You can change the value of "1em" to larger (1.5, 1.6, 2.0, 2.2 ... etc) or smaller (0.5, 0.7, 0.9 ... etc)