There's a great rundown on Linux vs NT with the experiences of big US sites running each and the pros and cons in a number of important areas such as scalabilty etc.<br />It's at Webmonkey and worth a read for those still deciding on a host.<br /><br />http://hotwired.lycos.com/webmonkey/99/20/index3a.html?tw=backend<br /><br />And the Apache web server seems to be the most common according to the Netcraft Web Server Survey at<br />http://www.netcraft.com/Survey/<br /><br />Darren.<br /><br />