Well currently at 2:34pm all international websites are inaccessible.
Can still get to .co.nz domains and .net.nz but all international sites (ie: the actual reason people go online) are inaccessible.
The Xnet DNS servers are getting attacked so if you want to get anywhere then you need to use alternate DNS servers for the time being.
For those who dont know how to change the DNS Servers go to,
Start->Control Panel->Network Connections,
right click on your active network connection and select "Properties".
In the list select "Internet Protocol (TCP/IP)" and click [Properties]
Then down the bottom for "Perferred DNS Server:" put in
and for "Alternate DNS Server:" put in
Those are OpenDNS's servers.