Extract printable text from web page using preg_match

M5 <m5@xxxxxxxxxxxxxxxx> · Tue, 27 Feb 2007 10:47:02 -0700

I am trying to write a regex function to extract the readable  
(visible, screen-rendered) portion of any web page. Specifically, I  
only want the text between the <body> tags, excluding any <script> or  
<style> tags within the document, also excluding comments. Has anyone  
here seen such a regex? Is it possible to do in one expression?

...Rene