The document discusses several themes around digital preservation including structures for collaboration, open source software, economics of preservation, and new patterns of production. It notes the increasing demands on institutions to preserve vast amounts of digital content and the challenges of predicting long-term costs. Specific costs are provided for scanning different media types. Complex cost models try to illustrate uncertainties but show preservation costs are much higher than storage costs. Partnerships are discussed but can be uncertain. Personal archiving is growing in importance.