I don't know about other kernels but Entropy's has overclocking up to 1.2ghz built in but I still find that to be horribly inadequate. I was running 1.5 stable on the stock rom and it made the whole device eons faster. I'm sick of having to use tegrak because it doesn't work on all the ROMs currently available.
Can anyone pretty please recompile the kernels with voltages and CPU speed unlocked? I know people will probably abuse it, but that's what disclaimers are for!