acpi_sony - no powerd, no man page!

Hello,

I just installed BETA4 on my notebook and was curious about the acpi_sony 
driver, but all I can see is that powerd soesn't work anymoder (if I call 
powerd -a min dev.cpu.0.freq is still 800 wher it was 62 without acpi_sony 
compiled in) and that I can set LCD brightness :) *bright_smile*
But what does ctr, pcr, wdp and cdp mean?
A short man page was wonderful!
And is it known/intended that cpufreq doesn't work with acpi_sony?

Thanks,

-Harry