Editors cover of the Cure's 'Lullaby' is the best cover I've heard.
edited to add link:
<a class="postlink" href="http://www.youtube.com/watch?v=4fOcU-K_fAQ" onclick="window.open(this.href);return false;">http://www.youtube.com/watch?v=4fOcU-K_fAQ</a>