HTC EVO 4G :: Any Overclock Experiences To Share Above Sticky?

Not that the above sticky is not useful and interesting. For those who have not read it, there is a debate raging about the effect of a specific OC setup on battery life.Regardless of that, has anybody else tried to overclock the processor for speed, or underclock it for battery? I am curious about a few things:

1. If you overclock the process for speed, which applications benefit? So far, there is very little lag anyway - without overclocking.

2. Is it not necessary to up the voltage going to the Evo processor when overclocking? For example, when I overclocked my home pc, I changed the voltage and the RAM timing.

3. When underclocking, if the same "stock" voltage is going to the processor anyway how does anybody expect to get battery savings? In my mind, the speed of the processor is not the issue, it is the energy that the processor consumes. (Or is this automatically handled by the widget behind the scenes?)

4. When underclocking the processor - have you experienced more lag? What is the "slowest" the processor can run before you notice anything?

5. What general experiences have you had with applications, the process, etc.