We have moved, not without a minor hiccup or two, but the DNS, SSL certificate issue was soon resolved. For some reason our hosting company thought having two IP addresses was a good idea, now the dot-com only has one IP address everything seems to be working as expected.
All of the addresses should get you there:-
Issues with corporate firewalls should resolve themselves, at a guess it was because the site is new and/or the SSL certificate and DNS issues.
Updated 21st November