Check this code (http://wordpress.org/support/topic/176355?replies=4).
<?php
$subscribers = $wpdb->get_results("SELECT ID, user_nicename from $wpdb->users ORDER BY user_registered DESC");
for($i=0;$i<4;$i++){
echo "<li>".$subscribers[$i]->user_nicename."</li>";
}
?>
Thank you very much! Your post has been really useful for me!
I has been a lot of time stucked in this problem…
Cheers from spain!
