cpudyn 1.0-2.1 (i386 binary) in ubuntu karmic

 cpudyn controls the speed in Intel SpeedStep, Pentium 4 Mobile,
 AMD Powernow, PowerPC, Crusoe LongRun machines with the cpufreq compiled
 in the kernel, or with machines that support ACPI throttling. It saves
 battery, lowers temperature, and can put the computer disks in standby
 mode if a given period has passed without any I/O operation. It works
 well even with journaled file systems such as Ext3, XFS, or ReiserFS.
 Even supports the new interface for kernels 2.6.x