It seems that WHT down this eary morning,
and when i connect here,
I got a squirrelmail sign on page.

Or it's my isp problem?
I have no problem accessing other place at that time.

hm it seems if u type webhostingtalk.com without the www.prefix you are delivered to that squirrelmail page.

http://www.webhostingtalk.com/showthread.php?s=&threadid=95928