A networked computer system provides various services for assisting users in locating, and sharing information with, other users. The system provides a user interface through which users can establish contact relationships with other users. The system also provides functionality for users to identify contacts of their respective contacts. For example, in one embodiment, each respective user can conduct a search of contacts of contacts of the respective user. The search may be limited in scope to users that satisfy one or more particular search criteria, such as users that reside in a particular region or are affiliated with a particular group.