Archivemount is a piece of glue code between libarchive (http://people.freebsd.org/~kientzle/libarchive/) and FUSE (http://fuse.sourceforge.net). It can be used to mount a (possibly compressed) archive (as in .tar.gz or .tar.bz2) and use it like an ordinary filesystem. WWW: http://www.cybernoia.de/software/archivemount/