One of the smallpicture.com servers is down.
It's not responding to low-level network pings, so the problem seems to be at the service-provider level.
 We've tried to reboot the machine, that didn't bring it back.
We've tried to reboot the machine, that didn't bring it back. 
Tried stopping the instance, hoping to restart it in a different AWS zone, but it's been trying to stop for about 1/2 hour. Usually it takes less than a minute.
Interestingly, we got an email this morning from Amazon saying that the server is going to be retired in September, and we'd have to stop and restart it in September. Is this a coincidence?
This is not one of our main servers. It handles tasks like allocating names for outlines, and acting as a proxy for WordPress. Fargo , because so much of it runs on the user's machine, is still working fine. I'm writing this post in Fargo.
I'm posting a link to this on our user support mail lists. If you have questions or suggestions, please post a comment here. Thanks!
At least the outage happened on a Sunday.