Shared file systems used to be, and still are, common places to keep shared information. Shared email folders are another place to keep common information.
Teamspaces (e.g., Microsoft SharePoint) contain a lot of structure. Among other things, they have a file store. As users get familiar with teamspaces, they often find that teamspaces are a more natural place to save files than in file servers. This intuition is often well-placed. Teamspaces will be important information repositories.
In many ways, consumers are leading the way here with the use of social teamspaces, such as Myspace.