February 12, 2011 
Definition:
function get_blog_post( $blog_id, $post_id ) {}
Get a blog post from any site on the network.
Parameters
- int $blog_id: ID of the blog.
- int $post_id: ID of the post you’re looking for.
Return values
returns:post.
Source code
function get_blog_post( $blog_id, $post_id ) {
global $wpdb;
$key = $blog_id . '-' . $post_id;
$post = wp_cache_get( $key, 'global-posts' );
if ( $post == false ) {
$post = $wpdb->get_row( $wpdb->prepare( 'SELECT * FROM ' . $wpdb->get_blog_prefix( $blog_id ) . 'posts WHERE ID = %d', $post_id ) );
wp_cache_add( $key, $post, 'global-posts' );
}
return $post;
}
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A HitchHackers guide through WordPress 
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