CSS non-wrapping floating divs

Use display: inline-block instead of floatand give the container white-space: nowrap.

div#sub > div#ranking {
    position:relative;
    top:42px;
    left:7px;
    width:722px;
    height:125px;
    overflow-x:auto;
    overflow-y:hidden;
    white-space: nowrap;
}
div#sub > div#ranking > div.player {
    display: inline-block;
    width:67px;
    height:120px;
    margin-left:5px;
    background-color:#f3e1bb;
}

Here an example: http://jsfiddle.net/D5hUu/3/