Output a snapshot of any website!

functions.php

<?php

// Output a snapshot of any website!

function wp_snap($atts, $content = NULL) {
        extract(shortcode_atts(array(
  		"snap" => 'http://s.wordpress.com/mshots/v1/',
			"url" => 'http://wpspeak.com/',
			"alt" => 'WPSpeak',
			"w" => '600', // width
			"h" => '400' // height
        ), $atts));

		$img = '<img alt="' . $alt . '" src="' . $snap . '' . urlencode($url) . '?w=' . $w . '&h=' . $h . '" />';
        return $img;
}

add_shortcode("snap", "wp_snap");

// Use [snap url="http://wpspeak.com/" alt="WPDaily Website" w="600" h="400"]