It is, after all a "relational database". The real power of the application is the relational visibility you get by seeing who and what is related to the entity. Upon viewing the details of an entity, the user may link any other entity and begin to define the relationships around each entity. The search tool for picking the related entity was recently enhanced (July 17, 2008) to search much faster and pre-display recently added entities.
Entities are People, Organizations, Opportunities, Cases, Projects, Tasks, and Appointments