read-only compressed fs (call for testers)

Hello!

I have seen some requests for read-only compressed fs support recently.
Last weekend I had a few spare cycles and implemented GEOM class that
allows to use cloop V2.0 (compressed loopback device for Linux) fs images.

More details, tarballs with geom_ugz and a port for tools needed
to create/extract compressed fs images are available at
http://people.freebsd.org/~fjoe/geom_ugz/

Any feedback is highly appreciated.

/fjoe