Hi,
thought you might be interested in this.
DeNIC (the registrar for .de domains) is planing a DB migration:
http://www.denic.de/en/denic-in-dialogue/news/3585.html
Apparently this will be a migration to PostgreSQL:
http://help.opensrs.com/entries/22372308-de-scheduled-maintenance-november-18-19-2012-extended
Regards
Thomas