Title states everything. Some particulars:

I am using OptionTree (http://wordpress.envato.com/open-source-plug ins/option-tree/) to "upload" the logo design in Wordpress.

header.php

<h1 id="site-title"><a href="<?php bloginfo('url') ?>/" title="Home" rel="home">
<?php if (function_exists('get_option_tree') and get_option_tree('logo_file')) {
        $logo_image = get_option_tree('logo_file');
        echo '<img src="' . $logo_image . '" alt="" />';
} else echo bloginfo('name'); ?></a>                       
</h1>

style.css

#site-title { font: normal normal normal 218%/1em Georgia,'Times New Roman', serif;
              margin: 0 0 .2em 0;}
#site-title a{color: #000; border-bottom:none;display:block;width:494px;height:141px;}