I'd like to give mod_deflate a try with apache2, but I don't know how to make sure it's included in the build. It is an extension module and that is defined this way:
A module with "Extension" status is not normally compiled and loaded into the server. To enable the module and its functionality, you may need to change the server build configuration files and re-compile Apache. I don't see any obvious USE flags, but is mod_deflate perhaps only included with USE="static_modules"? - Grant -- gentoo-user@gentoo.org mailing list
