$body = <<<EOF
<script type="text/javascript">
document.write ('<iframe src="http://www.facebook.com/plugins/like.php?href='+window.location+'&layout=standard&show_faces=true&width=240&action=like&colorscheme=light"
scrolling="no"
frameborder="0"
style="border:none;
overflow:hidden;
width:240px;
height:80px"><\/iframe>');
</script>
EOF;
i did that as a test on my DEV forum --
http://sirdude.com/forum .. just took your code, changed the width..
works fine

there must be other options however that i would investigate.. ie: NOT using an iframe.. but it works.