Sorry, I had overlooked discussion about renaming mod_gz to mod_deflate but mod_deflate module is already exists: ftp://ftp.lexa.ru/pub/apache-rus/contrib/
It was public available from April 2001 and is already installed on many Russian sites and several non-Russian ones. Documentation is in Russian only. Sorry. Some features: It patches Apache 1.3.x so it allows to compress content without temporary files as mod_gzip does. It allows two encoding - gzip and deflate. It has some workarounds for buggy browsers. On FreeBSD it can check CPU idle to disable compression. Igor Sysoev
