Sorry folks. It turns out that I either didn't receive, or it went to spam, or I deleted - a post from our server about some maintenance on the servers today.
That said, we're back up ... but here's part of the message they just gave me:
"At this time the server is currently up and serving content. We are continuing maintenance to stabilize the server. We will be working to ensure the integrity of services in the long term but we may be seeing short outages. "
So, we can feel pretty confident that IF we are back down it will be for short time frames - and hopefully not at all.
I would have posted about the maintenance if I had seen the email Guess I somehow missed it.