I agree with you that limiting the maximum frequency is not always the best choice - especially when you really need computing power.

But as BLIZZARD pointed out correctly there are many apps which cause frequency upscaling to 600MHz when it is really not necessary (which is the case with many games).
And since CMOS power consumption is linear to the frequency you can certainly save battery power in such cases (always on 500MHz is better than always on 600MHz).

Of course it would be desirable to improve the actual frequency scaling code itself, but I do not have the time to deal with kernel-level stuff and I also want to stick with vanilla kernels.

BTW: overclockers might like this app in the summer. When it's 35C outside they probably don't want their N900s running at 1.3 GHz


- Dan