As per the thread title, GoDaddy appears to have been taken down. I don't know any more details but this will effect literally millions of websites.
[EDIT] http://www.bbc.co.uk/news/business-19549367
Ouch.
Oh dear...
Seems they came up shortly afterwards, since one site I use, www.hobbyking.com, was back by 00.45 once new DNS entries propagated.
Someone will get shouted at for getting that wrong.
http://www.datacenterknowledge.com/archives/2012/09/11/go-daddy-network-issues-not-hackers-or-ddos-caused-outage/
Caused by corrupt routing tables apparently.
Sounds like a reasonable explanation. The BBC are reporting the same: http://www.bbc.co.uk/news/technology-19559128