DigitalPreservationEurope has released a briefing paper on Database Preservation.
Here's an excerpt:
Information systems for most organizations are currently supported by databases. Preservation of these databases has to address problems including defining what is to be preserved, the creation and long-term evolution of the preserved objects, organizational support for preservation actions, and technologies that will keep the preserved objects accessible and trustworthy. Some of the issues in database preservation have already been addressed in electronic record preservation, but others result from the specific nature of databases.