You would have to edit footer.php for this, and put after
PHP Code:
<!-- Footer -->
<td id="footer" colspan="<?php echo $cols; ?>">
or before
PHP Code:
<?php wp_footer(); ?>
</td>
<!-- / Footer -->
this
PHP Code:
<?php if ( is_home() ) { ?>
<img src="/path/to/logo.gif" alt="Logo..." />
<?php } ?>