The new server should be in its final resting place tomorrow and hopefully after that everything will work again correctly. I know there are some problems with missing DNS names at least, but other than that I think it's working.
I created yesterday scripts that can now build dovecot.org from scratch in about 15 minutes (using backups of course). The new dovecot.org server was built using those scripts. So if in future there are ever trouble with a server dying, I should be able to recreate it easily.
I was also planning on adding some mirroring by adding 2+ A records to some names:
hg.dovecot.org can be mirrored either with hg itself pushing changes or calling rsync
www.dovecot.org can be mirrored with periodic rsync. The most frequent changes are mailing list archives and nightly tarballs.
wiki*.dovecot.org could also be rsynced and set read-only. A patched MoinMoin could show "Edit" links as pointing to master.wiki*.dovecot.org where editing is allowed.
That's basically everything, except for the mailing list, but that probably can't be easily helped.