CPU throttling on amd64

[A. Hamilton-Wright]

Does anyone on this list know the state of any userland
control tools for CPU throttling on the amd64 platform?

I see in the archives that there was little functionality
in this are as of 2004, and then substantial work in 2005
to make cpufreq available through sysctl.

At that time there is a thread indicating how nice it would
be if someone wrote a daemon to do the control for this a la
cpufreqd
 	http://lists.freebsd.org/mailman/htdig/freebsd-amd64/2005-February/003524.html

I cannot seem to find anything relating to throttling and
or AMD Cool&Quiet after that point.  Is there such a daemon?

Thanks for any pointers,
Andrew.