Hey faazz,
I wanted also add a css class suffix to the module. I solved this by adding a plus line in the *.xml file.

In the mod_facebook_like_box.xml, before the closing </params> tag, I added this:

Code:

<param name="moduleclass_sfx" type="text" default="" label="Module Class Suffix" description="A suffix to be applied to the css class of the module (table.moduletable), this allows individual module styling" />

It works perfectly. I have a question. I have seen that the little thumbnails of the Facebook fans disappeared from the module box (also on vivociti.com). Is this a problem of my browser/network/etc.. or is it a global bug? Thank you forward for the answer.