Here is a groovy little skin-level hack that will let you put *something* after the first post is displayed, then *something else* after the second post is displayed. The *something* bit will show up after every 'first post', meaning no matter how many times a visitor clicks through to more full pages in your archives it'll be there. It'll also be on every permalink page after the comments section. It won't show up on pages like profile and archives though, because there is no post displayed.

*something* could be your google adsense stuff eh? *something else* could be whatever you see fit to display on a multipost page in the main post area, but only want to display once. Heck it could be the same as *something* if that's what makes you happy.

You can add SOMETHING after the FIRST post, SOMETHING after the SECOND post, or SOMETHING after the FIRST post and SOMETHING ELSE after the SECOND post. This third option is what you see in action at http://ahga.org. The first option is known to work because that's what I did before I built in the *something else* bit. Therefore if you like the second option you might find it doesn't work. If so it'll probably be easy to fix so check it out and we'll fix whatever needs fixing.

No matter which option of the three you want to use, open your skins/your_skin/_main.php and find something that looks like this:

			// ---------------- END OF INCLUDE FOR COMMENTS, TRACKBACK, PINGBACK, ETC. ----------------

			locale_restore_previous();	// Restore previous locale (Blog locale)
		?>
	</div>
	<?php
	} // ---------------------------------- END OF POSTS ------------------------------------
	?>

To add SOMETHING after the FIRST post change it to this:

			// ---------------- END OF INCLUDE FOR COMMENTS, TRACKBACK, PINGBACK, ETC. ----------------

			locale_restore_previous();	// Restore previous locale (Blog locale)
		?>
	</div>

<?php // --------- SOMETHING OR SOMETHING ELSE INCLUDED ONCE EACH HERE ---------
if( ! $first_post_done ) {
	require( dirname(__FILE__).'/_something.php' );
	$first_post_done = true;
	}
// ------------------- END OF SOMETHING OR SOMETHING ELSE ------------------- ?>

	<?php
	} // ---------------------------------- END OF POSTS ------------------------------------
	?>

To add SOMETHING after the SECOND post change it to this:

			// ---------------- END OF INCLUDE FOR COMMENTS, TRACKBACK, PINGBACK, ETC. ----------------

			locale_restore_previous();	// Restore previous locale (Blog locale)
		?>
	</div>

<?php // --------- SOMETHING OR SOMETHING ELSE INCLUDED ONCE EACH HERE ---------
if( ! $first_post_done ) {
	$first_post_done = true;
	} elseif ( ! $second_post_done ) {
	require( dirname(__FILE__).'/_something.php' );
	$second_post_done = true;
	}
// ------------------- END OF SOMETHING OR SOMETHING ELSE ------------------- ?>

	<?php
	} // ---------------------------------- END OF POSTS ------------------------------------
	?>

To add SOMETHING after the FIRST post and SOMETHING ELSE after the SECOND post change it to this:

			// ---------------- END OF INCLUDE FOR COMMENTS, TRACKBACK, PINGBACK, ETC. ----------------

			locale_restore_previous();	// Restore previous locale (Blog locale)
		?>
	</div>

<?php // --------- SOMETHING OR SOMETHING ELSE INCLUDED ONCE EACH HERE ---------
if( ! $first_post_done ) {
	require( dirname(__FILE__).'/_something.php' );
	$first_post_done = true;
	} elseif ( ! $second_post_done ) {
	require( dirname(__FILE__).'/_something_else.php' );
	$second_post_done = true;
	}
// ------------------- END OF SOMETHING OR SOMETHING ELSE ------------------- ?>

	<?php
	} // ---------------------------------- END OF POSTS ------------------------------------
	?>

Now be creative and make files called _something.php (and _something_else.php if you are adding two custom bits) in your skins/your_skin/ folder. Each of them needs to look something like this:

<?php 
/*
 * This is a custom page that adds *something* or *something else* after the first or second post displayed on a page.
 *
 * Do NOT remove the "if ! defined ... " line unless you want hackers to eat your babies!!!
 */

if( !defined('EVO_MAIN_INIT') ) die( 'Please, do not access this page directly.' );

echo 'This is where you put your custom code.  It can be anything you want.<br />';
echo 'It will be inside your "posts" loop (<div class="bPosts">), but NOT inside a post (<div class="bPost">).<br />';

?>

<div class="bPost">
<p>You can use regular html code if you want, just remember to use appropriate divs and classes.</p>
</div>

<?php 

echo 'You can also mix and match php and html.  I have not tested it, but I think it will also know about the post it just displayed via $Item.<br />';
echo 'That is hard to take advantage of though because the first post displayed will always be different depending on if your visitor is <ul>';
?>

<li>at an entry page</li>
<li>looking at a specific category</li>
<li>has clicked 'previous' a few times</li>

<?php 
echo '<li>is on a permalink page</li>';
echo '</ul>'."\n";

?>

By the way, this will work in any version of b2evolution ever released.

EDIT: The something bit shows up after (not before) comments on a permalink page.