The other day the site was down for a considerable amount of time... a couple hours at least.  What upgrades were done?

I don't think there's any info on this out here yet, but you could ask the Admin Team.  I haven't noticed any changes, so I assume it was either maintenance, programming to make things run smoother, or programming to allow something else to happen in the future.  No clue, though, Adrienne.
 

I am now wondering what was changed also!  I kept trying to log in for a couple of hours & kept getting the maintenance page.  I had forgotten about it until I saw your post here.

They were swapping out a server and doing some other tinkering.  We were running terribly low on storage space.