At the moment this package only contains some scripts to help configuring the settings of the enhanced kernel. They are by default inactive. As it depends on this kernel, it will also install the enhanced kernel. More information can be found at the wiki page of the kernel http://wiki.maemo.org/Kernel_Power It does not (yet) provide GUI as the CLI icon indicates. It is both for power settings and power users. The next version will have a more elaborate description.

Great to see the very helpful description with this version :)
I'll be sure to give this a go when I'm feeling adventurous again - I ran the previous version @ 900MHz until I had strange wifi behaviour one day, and then on reboot it set me back to the stock settings, so I left it there. No harm done, I guess - I'm not expecting a 5 year life out on my N900 anyway.