On my Asus Z9252Va (A6Va based) powerplay works.
I'm using openSUSE 10.3 and Sidux.
I've installed the driver by compiling it and not by creating a package before installing (this causes normally more damage than use).
I too don't have an entry in amdcccle but I think that's simply not implemented yet. I'm switching with my own tool (Systemcenter), or the aticonfig tool.
If you'd like to test it out: be warned: it's really early, by far not perfect and still under heavy development.
With the best regards
PS: try the svn edition.. the downloadable tar is out of date.
PS2: Systemcenter too uses aticonfig to switch the powerplay options.. it's just a gui for doing it