.tickercontainer { /* the outer div with the black border */
width:760px;
margin:0 10px;
height:46px;
}
.tickercontainer .mask { /* that serves as a mask. so you get a sort of padding both left and right */
position: relative;
width:760px;
margin-right:20px;
height:46px;
overflow:hidden;
}
ul.newsticker { /* that's your list */
position: absolute;
list-style-type: none;
height:46px;
width:5000px;
}
ul.newsticker li {
float:left;
text-align:center;
line-height:23px;
font:11px/23px Tahoma;
color:#fff;
padding:0 10px;
}
ul.newsticker a {
white-space: nowrap;
padding: 0;
color: #ff0000;
margin: 0 50px 0 0;
} 
ul.newsticker span {
margin: 0 10px 0 0;
}