Thanks for bringing it back online! Happy to hear it was just migration problems.
I got a bit worried for a moment there. We have a very low
bus factor for osdev.org. If you suddenly ever become unable to maintain osdev.org, is there any plan in place for how the community can take over control? If you trust any of the moderators enough, you could give that person ssh access (or maybe just mysql access) so that person takes ownership if you disappear. Alternatively, you could setup a death man's switch that mails a ssh password to that person. The same could be done with ownership of the osdev.org domain itself. Since you appear to be using @osdev.org for your personal mail, community domain control might be a risk for you though.
I've set up a cronjob to download the osdev wiki weekly zip to one of my servers. Which day is it generated on? It doesn't come with the page histories, so it is a bit of a loss of copyright information. Your backup scheme sounds good to me. Could the community be given automatic access to those off-site backups, or can we arrange backups to community-operated servers?