yes, somebody knew

no, there is nothing hidden

Well known unused features are HW acceleration provided by IVA and MBX.

Then, as I already said in an easter egg related thread, N810 has a embedded ucontroller for the LED (see link i nthe same thread) which could be programmed for doing different effects.

Some of the other chips might give the false impression that there is more, but only because those chips are used in phones too. However nothing is really functional.

Going back to the clock settings, I spent quite some time trying to figure out some other working clock configuration (other than those provided by TI) - I still have a whiteboard filled with clock rates, but there is noeasy upgrade.

Some extra juice could be obtained if certain parts are overclocked when others that would fail are not in use, but the implementation is not so trivial.

But the kernel code is there, if anybody wants to try.