You can try this. Make a backup of your theme files first. I say, make a backup first.
Open header .php and find this:
<ul class="fix">
<li class="page_item "><a class="home" href="<?php echo get_settings('home'); ?>/" title="Home"><img class="homeimage" src="<?php bloginfo('stylesheet_directory'); ?>/images/home-icon-trans.png"/></a></li>
<?php
$frontpage_id = get_option('page_on_front');
wp_list_pages('sort_column=menu_order&exclude='.$frontpage_id.'&depth=1&title_li=');?>
</ul>
Change it to this:
<ul class="fix">
<li class="page_item "><a class="home" href="<?php echo get_settings('home'); ?>/" title="Home"><img class="homeimage" src="<?php bloginfo('stylesheet_directory'); ?>/images/home-icon-trans.png"/></a></li>
<?php
$frontpage_id = get_option('page_on_front');
wp_list_pages('sort_column=menu_order&exclude='.$frontpage_id.'&depth=1&title_li=');?><li><a href="http://feeds.feedburner.com/laptopmemo"><img height="18" alt="LaptopMemo.com RSS Feed" src="http://farm3.static.flickr.com/2658/3928169685_282abd1932_o.png"/> </a></li><li><a href="http://twitter.com/laptopmemo"><img height="18" border="0" width="18" title="" src="http://farm3.static.flickr.com/2504/3928951758_7cf3350420_o.png"/> </a></li><li><a href="http://facebook.com/stefan.etienne"><img height="18" border="0" width="18" src="http://farm4.static.flickr.com/3532/3928169659_324c7a768f_o.png"/> </a></li><li><a href="http://es.technorati.com/blogs/laptopmemo.com"><img height="18" border="0" width="18" title="" src="http://mysocialbuttons.com/socialicons/technorati.png"/></a></li>
</ul>
Exactly. Did I mention making a backup? This placed all of your icons, in size 18x18, directly to the right of existing pages in the header nav. It worked perfectly on my test site. Your mileage may vary. Good luck!
AND MAKE A BACKUP FIRST! :P