cromfs : Compressed ROM filesystem for Linux (user-space) ( http://bisqwit.iki.fi/source/cromfs.html )
fusecompress : FuseCompress - compresses filesystem ( http://www.miio.net/fusecompress/ )
memcachefs : A memcache filesystem using FUSE ( http://memcachefs.sourceforge.net/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a swegener
For Paludis use this rsync : rsync://gentoo.zugaina.org/swegener-portage
If you have a problem : ycarus(-at-)zugaina.org