Well, I took a look at the code and It's actually implemented, here it doesn't work because of this:
* cpufreq module actually looks for dev.cpu.X.freq, but it's unable to "work" because it lacks privileges.
* temperature module looks into the hw.acpi.thermal.X.temperature sysctl, which is unexistant in my system; that's because I use amdtemp, which exposes the data through dev.amdtemp and dev.cpu.
* mixer is actually implemented, but for alsa and pulseaudio (so, if that's running, it may work), no OSS
I'll poke with it, but unfortunately e17 hangs at initializing =/
it doesn't happen if I make suid enlightenment_start (without this, it complains about not being to assume root privileges), but that's not a solution, it's a workaround that causes other problems (like runner not being able to lauch certain apps. and such), noticed that enlightenment_sys is not suid and afaik it should.
enlightenment used to work so well .... *sigh*
P.S > ty, but the thing about ZFS was an example about getting data from different places and how suitable is each place; Oh, in fact I use zfs-stats