I just tried again and the Facebook sign, instead of giving you an Inactive...down for maintenance message, now takes you to their Facebook page. One of the first posts, from Hojo says:
"hojo Happy Fans- Our Happy Wheel will be down for a short period of time. In lue of spinning the Happy Wheel, play our Happy Playlist and boogie down, it's almost Friday"
So, hopefully the sponsor is aware of the problem and is working on it.