The site will be off the air some time this evening or tomorrow, so that it can be migrated to a new server. The old one has an OS that's out of support now (can't get free OS updates for it any more). Will probably take 30 minutes, and I'll report here when I know when it's likely to happen.
Site now migrated to a new server - looks like everything is working, but if you do see a glitch let me know. Thanks!