Ben,
I tried that but to no avail. I even tried connecting to
secure.clearcenter.com/portal/new_account.jsp from a standalone machine directly connected to the internet, bypassing the router and firewall and the same thing happens.
Surprisingly enough, when I connected my laptop to the internet using my 3G connection, I was able to open the site
secure.clearcenter.com/portal/new_account.jsp!!!!
I think this should be escalated to the admins and see if my IP address is being blocked (80.88.131.167).