Hi,
The problem was fixed about 2 hours ago. The DNS zone file of hostnexus7.com came alive and deleted it's own A records for the hostnexus7.com nameservers. So any sites using those nameservers would have been in limbo.
It lasted 3-4 hours.
(I just pasted in a message that Chris had sent out to a few people to save time.

. It was quite hectic here for a while...)