decor-grid-loop

/** Add post image above post title */
add_action( 'genesis_before_post_title', 'decor_post_image' );
function decor_post_image() {

	if ( is_page() ) return;

	else

	if( in_array( 'teaser', get_post_class() ) && $image = genesis_get_image( 'format=url&size=grid-image' )) 
	{printf( '<a href="%s" rel="bookmark" class="post-photo"><span class="grid-date">%s</span><img src="%s" alt="%s" /></a>', get_permalink(), do_shortcode( '<em>[post_date format="j"]</em>[post_date format="F Y"]' ), $image, the_title_attribute( 'echo=0' ) );
	}
	else
	if( in_array( 'feature', get_post_class() ) && $image = genesis_get_image( 'format=url&size=post-image' )) 
	{printf( '<a href="%s" rel="bookmark" class="post-photo"><span class="post-date">%s</span><img src="%s" alt="%s" /></a>', get_permalink(), do_shortcode( '<em>[post_date format="j"]</em>[post_date format="F Y"]' ), $image, the_title_attribute( 'echo=0' ) );
	}

}

This creates a grid loop on the homepage of a site using the Decor theme, and shows the featured image above the post title.