archwrap : A collection of POSIX shell scripts to invoke archiver programs ( https://github.com/vaeth/archwrap/ )
bzwc : A POSIX shell wrapper for wc, supporting compressed files (xz, lzma, bz2, gz) ( https://github.com/vaeth/bzwc/ )
paq8l : Open source file compressor and archiver ( http://mattmahoney.net/dc/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a mv
For Paludis use this rsync : rsync://gentoo.zugaina.org/mv-portage
If you have a problem : ycarus(-at-)zugaina.org