after a long period of thinking about it i just did it:
i overclocked my linux powered cellphone.
since a week or so, a replacement kernel is available on "preware", the homebrew installer.

this kernal in kombination with a tool called govnah enables you to choose the speed of your cellphone with some predefined "govenors", such as ondemand, userspace or "performance"

its reallyreally impressive how fast the phone reacts after setting the speet to 800 mhz :D

here a pic:


webdoc

p.s.:
just tried my gameboy emuklator: GBA works like a charm now _with_ sound. not a bit crunched \o/ just perfect .