Just checked,
http://www.facebook.com (main site) isn't working <-- SERVER NOT FOUND
http://mobile.facebook.com (mobile site) isn't working <-- BRINGS UP VIRGIN MEDIA SEARCH
http://touch.facebook.com (iPod Touch site) isn't working <-- SERVER NOT FOUND
http://www.facebook.com/home.php (Alternative Homepage) isn't working <-- SERVER NOT FOUND
http://www.facebook.com/login.php (Login Screen) isn't working <-- SERVER NOT FOUND