The combinFormation [ecologylab.net/cf] creativity support tool integrates searching, browsing, collecting, and thinking about information. An evolving information collection is visualized in a mixed-initiative composition space: the user manipulates information directly, and invokes agents to search, compose, and crawl the web. The agents are initially directed through a set of seeds: search queries, documents, web sites, feeds, and curated collections. As the user expresses interest in composition elements, agents dynamically gather relevant information.