Extend the filedrawers interface so that archive files (e.g., ZIP, .tar.bz2, etc.) can be navigated into as if they were folders. Make as many operations as possible in the filesystem itself also available "within" the archive -- at a minimum, downloading and viewing individual items within an archive should be possible.
Note: this is distinct from id 1338929, which deals with presenting a separate interface for archives, as well as creating archives from sets of selected files.