take a look around line 1405 in your css and add some margin space like this –
.home-feature-bg-alt .featuredpage .page,
.home-feature-bg-alt .featuredpost .post {
float: left;
margin: 0 20px 0;
overflow: hidden;
padding: 0 0 5px;
width: 300px;
}
You can adjust the margin and the width of the posts as well.
