Because all power will be removed from our equipment during this outage, DNS and authentication services will not be available.

If you establish a DSL or dial-up connection during this interval, that connection should remain up but none of our host services will be available, including DNS.

You can browse the web by using alternate public DNS servers.  There is a list of free public DNS servers at http://pcsupport.about.com/od/tipstricks/a/free-public-dns-servers.htm.