In the age of Google, what is a digital library anymore, anyway? Just asking the question is bound to raise passions. Despite our zealous defense of the successful work of the digital library community over the past decade, the amazing success of commercial web search engines has changed the playing field. Search and access over a set of resources, while important to any digital library, are not sufficient. Digital libraries need to distinguish themselves from web search engines in the manner that they add value to web resources. This added value consists of establishing context around those resources, enriching them with new information and relationships that express the usage patterns and knowledge of the library community. The digital library then becomes a context for information collaboration and accumulation – much more than just a place to find information and access it