There are a few ways to put social buttons in a row. The JFBCSocialShare module is an easy way to setup whichever buttons you want and then you can place them in any module position or even have them 'float' at the bottom of the page like on this site.
You can use the {SC..} tags to add them. By default, they will stack on top of each other. You can add some CSS to force them to float left which will make them go in a line if you're looking for that. Just let us know a page where we can see the buttons configured and we can help provide the CSS to make them show in a line.
If you put the following HTML divs around your easy-tags, you can take advantage of the CSS styling for our content plugin that floats the buttons on the same line.