Joshua Sigar

Well, you need to make the header clickable. Below is a sample markup.

<div id="header">
<h1><a href="http://mysite.com">My site</a></h1>
</div>


and the css…


h1 {
text-indent: -3000px; /* hide the text */
}
h1 a {
display: block;
height: 150px; /* the height of upper half img */
background: url(my-header.gif) no-repeat 0 0; border: none;
}
h1 a:hover {
background-position: 0 -150px /* shift the img upward to get lower half shown */
}


You just need to adjust that “+/- 150px” value

Leave the existing Loop alone.

Go to sidebar portion (which should be after and outside the existing Loop) and add something like the following.
// query_posts(author=1…
// the Loop that output post title link

You’d just need a Loop that will retrieve and display Posts of certain author. The first link shows you how to retrieve based on certain criteria. The second link shows you how to set up another Loop

http://codex.wordpress.org/Template_Tags/query_posts
http://codex.wordpress.org/The_Loop#Multiple_Loops

I know this AJAX thing is very trendy and cool looking, but does it work with old browsers?
Everything will gracefully degrade and still work when a browser does not support AJAX.

I really would have liked to see “Custom fields for users” and “A Complete User/Author Profile Page with his/her recent Posts or recent Actions.”
These parts have to be realized by plugin authors. WP already provides everything to make all those happen.

My apology for keep giving inaccurate answer. The following code has been tested. The code is to be put on the file single.php, after and outside the main Loop.

<?php
$cat = get_the_category();
$cat = $cat[0];
$posts = get_posts("category=" . $cat->cat_ID . "&numberposts=5");
if( $posts ) :
?>
<div class="recent-posts">
<h2>More on this category</h2>
<ul>
<?php foreach( $posts as $post ) : setup_postdata( $post ); ?>
<li><a href="<?php the_permalink() ?>" title="Permanent Link to <?php the_title(); ?>"><?php the_title(); ?></a></li>
<?php endforeach; ?>
</ul>
</div>
<?php endif; ?>

Try this.

<?php $posts = get_posts( "category=" . $id . "&numberposts=5″ ); ?>
<?php if( $posts ) : ?>
<div class="recent-posts">
<h2>More on this category</h2>
<ul>
<?php foreach( $posts as $post ) : setup_postdata( $post ); ?>
<li><a href="<?php the_permalink() ?>" title="Permanent Link to <?php the_title(); ?>"><?php the_title(); ?></a></li>
<?php endforeach; ?>
</ul>
</div>
<?php endif; ?>

http://static.wordpress.org/archive/

A couple reading
http://codex.wordpress.org/Customizing_the_Read_More
http://codex.wordpress.org/Template_Tags/the_excerpt