1. At a Web application on a Web server in a computerized environment, the Web application receiving a request from a requesting computer system for processed content that is based at least in part on content source that is maintained separately from a file system, a method of providing the requested content by interaction with a virtual path provider, comprising the acts of: receiving a request for content that is based at least in part on content source that is maintained separately from a file system; determining that a virtual path provider provides access to the content source; and accessing the requested content in a manner determined by the virtual path provider, such that a processed form of the content source is accessed through a cache entry, or such that the content source is received as a stream from the virtual path provider through the virtual path.