Further recovery update.
2011.12.19
Mailservice on ambrosia.melon.org has been restored, and the MX records for melon.org have been repointed at the new hardware. Additionally, anarreshealth.ca and shiny.melon.org have been successfully migrated to the new hardware. These fixes may not yet be visible to some users at the time of this posting, due to DNS propagation delays.
Still not working on the new hardware are spotted.melon.org (which did not have a current backup at the time of the crash and will have to be rebuilt entirely) and mailman/fleshy.melon.org. Since spotted.melon.org is embedded into deadly.melon.org, that bit of functionality is also unavailable.