I noticed in this swicki blog post some tips about how to optimize your buzz cloud for your website:

For example, it’s possible to use a parent html block element to resize the width of your buzz cloud. But there are more possibilities while using CSS: I re-styled this buzz cloud to get some mouse-over effects with the colors from the website:

#swicki a {
color:#4088b8;
}
#swicki div a:hover {
color:#F15A22;
}

You need to add an ID to your parent container element.