I was surprised to see my site showing the servers up as well, but according to the server status page, they were all up: http://us.battle.net/wow/en/status
Are they still down? I haven't tried logging in yet today.
It's odd. It was showing as offline so I logged into the server, checked their server status page and reloaded\refreshed my web site page then posted here. Five minutes later it was showing correctly.
The issue may very well be on Blizzard's end as I am aware they have been having some stability issues with Battle.net.