Ajax load in Wordpress theme for webcomic

Ajax load in Wordpress theme for webcomic

I'm trying to create a theme in Wordpress for my webcomics. The problem is
about a few usability features and good practices:
Ajax load in next/prev navigation
Keyboard navigation
URL changing
You can see all this features in a Wordpress.com theme:
http://paneldemo.wordpress.com/, but is no available for download.
My code now is static:
<div id="content">
<?php query_posts('showposts=1'); ?>
<?php if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>
<div class="post">
<?php //content here ?>
</div>
<?php endwhile; ?>
<?php endif; ?>
<div class="post-nav">
<?php previous_post_link('<div class="prev-post">Next post:
<span>%link</span></div>'); ?>
<?php next_post_link('<div class="next-post">Previous post:
<span>%link</span></div>'); ?>
</div>
Any ideas? Thanks!