Site is back up: http://[200:718d:c499:3fce:c5e:65c6:73d6:f46d]/ or http://ramble.ygg if you're using Wyrd's Ygg DNS.
So, I had never needed to move a Yggdrasil site before. Was wondering if, and how, it'd be possible to maintain the same IPV6 address when moving to a new server. Documentation is scarce but I hopped in #yggdrasil on Benis IRC and it was literally as simple as copying the /etc/yggdrasil.conf file from the old server to the new server. Really, that's it.
Just disable Yggdrasil on the old server after you've done that so all routing will hit the new one.
In and out, five minute job. Easy peasy.