signup.php is recieving redirect error on wordpress 3.0

http://pearsoncommunications.com/wp-signup.php

i get this error

Safari can’t open the page.
Too many redirects occurred trying to open “http://pearsoncommunications.com/wp-signup.php”. This might occur if you open a page that is redirected to open another page which then is redirected to open the original page.

how do i go about troubleshooting & correcting it?