See: http://snipplr.com/view/65413/

1. Get latest posts from multi-site WP blogs.php

<?php

/**
 * Get a list of the most recently updated blogs.
 *
 * A copy of WP's `get_last_updated()`, exept I've added ability to filter
 * and removed the need to pass so many args.
 *
 * @todo Move `$ignore` values to more global location?
 *
 * @see https://gist.github.com/mhulse/5718743
 * @see http://wpseek.com/get_last_updated/
 * @see http://codex.wordpress.org/WPMU_Functions/get_last_updated
 * @see http://wordpress-hackers.1065353.n5.nabble.com/WP-3-5-2-multisite-How-to-use-NOT-IN-in-wpdb-prepare-tp41812.html
 */

function FOO_get_last_updated($quantity = 40, $start = 0, $ignore = array('1', '19', '21',)) {
	
	global $wpdb;
	
	$ignore = implode(', ', array_map('absint', $ignore));
	
	return $wpdb->get_results($wpdb->prepare("SELECT blog_id, domain, path FROM $wpdb->blogs WHERE site_id = %d AND blog_id NOT IN ($ignore) AND public = '1' AND archived = '0' AND mature = '0' AND spam = '0' AND deleted = '0' AND last_updated != '0000-00-00 00:00:00' ORDER BY last_updated DESC limit %d, %d", $wpdb->siteid, $start, $quantity), ARRAY_A);
	
}

//--------------------------------------------------------------------

/**
 * Get latest posts from multisite blogs.
 *
 * @todo Move `$ignore` values to more global location?
 *
 * @see http://wordpress.stackexchange.com/q/5001/32387
 * @see http://wordpress.stackexchange.com/a/49027/32387
 * @see https://gist.github.com/mhulse/5718743
 * @see http://snipplr.com/view/65413/
 * @see http://wordpress-hackers.1065353.n5.nabble.com/WP-3-5-2-multisite-How-to-use-NOT-IN-in-wpdb-prepare-tp41812.html
 */

function FOO_recent_ms_posts($count = 10, $ignore = array('1', '19', '21',)) {
	
	global $wpdb, $table_prefix;
	
	$ignore = implode(', ', array_map('absint', $ignore));
	$rows = NULL;
	$tables = array();
	$query = '';
	$i = 0;
	$posts = array();
	$post = NULL;
	
	$rows = $wpdb->get_results($wpdb->prepare("SELECT blog_id FROM $wpdb->blogs WHERE blog_id NOT IN ($ignore) AND public = '1' AND archived = '0' AND mature = '0' AND spam = '0' AND deleted = '0'", 0), ARRAY_A);
	
	if ($rows) {
		
		foreach ($rows as $row) {
			
			$tables[$row['blog_id']] = $wpdb->get_blog_prefix($row['blog_id']) . 'posts';
			
		}
		
		if (count($tables)) {
			
			foreach ($tables as $blog_id => $table) {
				
				if ($i) {
					
					$query .= ' UNION ';
					
				}
				
				$query .= " (SELECT ID, post_date, $blog_id as `blog_id` FROM $table WHERE post_status = 'publish' AND post_type = 'post')";
				
				$i++;
				
			}
			
			$query .= " ORDER BY post_date DESC LIMIT 0, $count;";
			
			$rows = $wpdb->get_results($query);
			
			if ($rows) {
				
				foreach ($rows as $row) {
					
					$post = get_blog_post($row->blog_id, $row->ID);
					$post->blog_id = $row->blog_id;
					$post->row_id =$row->ID;
					$post->permalink = get_blog_permalink($row->blog_id, $row->ID);
					
					$posts[] = $post;
					
				}
				
				return $posts;
				
			}
			
		}
		
	}
	
}

2. Example HTML using FOO_get_last_updated().html

<?php foreach (FOO_get_last_updated() as $blog): ?>
	
	<?php switch_to_blog($blog['blog_id'], true); ?>
		
		<?php $details = get_blog_details($blog['blog_id']); ?>
		
		<section>
			
			<header>
				
				<hgroup>
					
					<div class="streamer alt2">
						<h1><a href="http://blogs.registerguard.com/">Blogs</a></h1>
						<h2><a href="<?=$details->siteurl?>"><?=$details->blogname?></a></h2>
					</div> <!-- /.streamer -->
					
				</hgroup>
				
			</header>
			
			<div class="w_row">
				
				<div class="w_col w_C130">
					
					<?=get_template_part('includes/blog', 'info')?>
					
				</div> <!-- /.w_col -->
				
				<?php global $post; ?>
				
				<div class="w_col w_C470 w_D300 Dla">
					
					<article>
						
						<?php $latest_post = get_posts('numberposts=1'); ?>
						
						<?php foreach ($latest_post as $post): ?>
							
							<?php setup_postdata($post); ?>
							
							<header>
								
								<p class="pub"><time pubdate datetime="<?=get_iso_8601()?>"><?=the_time('g:i a, M j')?></time>
								
								<h1 class="h4"><a href="<?=the_permalink()?>"><?=the_title()?></a></h1>
								
							</header>
							
							<p><?php the_excerpt(); ?><?=edit_post_link('edit', ' [', ']')?></p>
							
						<?php endforeach; ?>
						
						<?php wp_reset_postdata(); ?>
						
					</article>
					
				</div> <!-- /.w_col -->
				
				<div class="w_col w_D470 w_Cc Dlb">
					
					<?php $latest_posts = get_posts('numberposts=6&offset=1'); ?>
					
					<ul class="li1">
						
						<?php foreach($latest_posts as $post): ?>
							
							<?php setup_postdata($post); ?>
							
							<li><a href="<?=the_permalink()?>"><?=the_title()?></a><?=edit_post_link('edit', ' [', ']')?></li>
							
						<?php endforeach; ?>
						
					</ul>
					
					<?php wp_reset_postdata(); ?>
					
				</div> <!-- /.w_col -->
				
			</div> <!-- /.w_row -->
			
			<footer>
				
				<p class="jump"><a href="<?=$details->siteurl?>">More <span><?=$details->blogname?></span> &raquo;</a></p>
				
			</footer>
			
		</section>
		
	<?php restore_current_blog(); ?>
	
<?php endforeach; ?>

2. Example HTML using FOO_recent_ms_posts().html

<?php # Most recent posts from all blogs: ?>

<?php $posts = FOO_recent_ms_posts(10); ?>

<?php foreach ($posts as $post): ?>
	
	<li><span><a href="<?=get_blog_details($post->blog_id)->siteurl?>"><?=get_blog_details($post->blog_id)->blogname?>:</a></span> <a href="<?=$post->permalink?>"><?=$post->post_title?></a></li>
	
<?php endforeach; ?>

http://wordpress-hackers.1065353.n5.nabble.com/Blog-quot-last-updated-quot-Last-updated-what-td41612.html

Hi I'm new. Is there any new version of these codes for the latest WP and PHP?