How to move the share button, categories, by author and comments link up inline

First, to move the share button up inline, float the book-icon left, ie, change your style at line 155 in style.css to this:

.book-icon {
float: left; /* Add this float */
position: relative;
display: inline;
font-size: 20px;
top: 2px;
}

Add an hide the overflow on the post-meta div to contain its contents by adding overflow:hidden to .postmeta-home at line 466 in style.css as follows:

.postmetadata-home {
overflow: hidden; /* Make the overflow hidden */
width: 704px;
font-size: 13px;
padding-top: 7px;
padding-left: 39px;
margin-left: -40px;
padding-bottom: 7px;
border-bottom: 1px solid #C9CCD4;
border-top: 1px solid #C9CCD4;
-webkit-box-shadow: 0px 2px 2px rgba(30, 30, 30, 0.05);
-moz-box-shadow: 0px 2px 2px rgba(30, 30, 30, 0.05);
box-shadow: 0px 2px 2px rgba(30, 30, 30, 0.05);
}

On line 122 in style.css float your addthis button left:

.addthis {
float: left; /* add this float */
display: inline;
width: 100px;
}

And on line 144 float your meta container left:

.pmr {
float: left; /* Add this float */
display: inline;
}

That should do it… It works right in Chrome, you may need to check it in IE just to be sure…