#wrap {
   width:600px;
   margin:0 auto;
}
#left_col {
   float:left;
   width:400px;
}
#right_col {
   float:right;
   width:200px;
}

h1, h2, h3 {
	font-family:'Yanone Kaffeesatz',serif;
}

h3 {
	font-size: 23px;
	font-weight: 200;
}

body{
	font-family: 'Helvetica Neue', HelveticaNeue, Helvetica, Arial, 'Lucida Grande', sans-serif;
	font-size: 12px;
}

.centered-header {
	background: none;
	text-align: center;
	background: url(../../images/dotted.bg.png);
	line-height: 0;
}

.menu {
	list-style-type:none;
	margin:0;
	padding:0;
	overflow:hidden;
}

.menuli {
	float:left;
	font-family:'Yanone Kaffeesatz',serif;
	font-size: 23px;
	font-weight: 400;
}

.menulink {
	display:block;
	width:120px;
	text-align:center;
	padding:4px;
	text-decoration:none;
	text-transform:uppercase;
	color: black;
}
#wrap {
   width:900px;
   margin:0 auto;
}
#left_col {
   float:left;
   width:600px;
}
#right_col {
   float:right;
   width:200px;
}

h1, h2, h3 {
	font-family:'Yanone Kaffeesatz',serif;
}

h3 {
	font-size: 23px;
	font-weight: 200;
}

body{
	font-family: 'Helvetica Neue', HelveticaNeue, Helvetica, Arial, 'Lucida Grande', sans-serif;
	font-size: 12px;
}

.centered-header {
	background: none;
	text-align: center;
	background: url(../../images/dotted.bg.png);
	line-height: 0;
}

.menu {
	list-style-type:none;
	margin:0;
	padding:0;
	overflow:hidden;
}

.menuli {
	float:left;
	font-family:'Yanone Kaffeesatz',serif;
	font-size: 23px;
	font-weight: 400;
}

.menulink {
	display:block;
	width:120px;
	text-align:center;
	padding:4px;
	text-decoration:none;
	text-transform:uppercase;
	color: black;
}
Make wider and leave some space between cols.
Make wider and leave some space between cols.
