Been having the same issues myself for the past 12 hours, I could access only some of my sites, I could not connect via SSH or FTP, could not access webpanel or discussion forums.
My co-publisher in Canada (I’m in UK) was/is having no problems so I thought perhaps it was some kind of IP ban.
Forced a new IP from my ISP and I can now access sites I couldn’t before, but can’t access ones I could. I can connect via SSH and FTP, but I still can’t access the web panel.
Sending e.mail to support gets bounced as the subject line doesn’t contain a ticket number. Had co-publisher raise a ticket but as yet no reply.
All in all, very bizarre and very frustrating.