Ok I found the ClickBank Forum with lots of updates.
If you have any PAID campaigns, may want to pause them for a bit until you are sure everything is working again.
Evidently ClickBank.com has been working but ClickBank.net has been up and down and that's where the order forms and everything are. Some are reporting hoplinks are not working, others say they are back up but slow. I would just keep an eye on the thread below to follow the lastest news.
http://www.clickbanksuccessforum.com...er=asc&start=0
Hope this helps and best of luck!