Posted 1.0b4 with native OC/UV.
You don't have to use it, or you can still use Tergak. If not enabled there should be no changes to the phone (if you find any let me know!) If you want to use it, get SetCPU (http://forum.xda-developers.com/showthread.php?t=505419
You cannot use both Tegrak and SetCPU, they will fight with each other. Uninstall Tegrak if you want to use native kernel overclocking.
I'm running 1.4 Ghz right now and it seems fine, but probably wouldn't recommend it to everybody, it just sounds too high for our CPU.
I implemented smooth ramping up for frequencies higher than 1.0 Ghz. The frequency will not jump immediately to the highest available. This should help to save some battery.
The kernel is slightly undervolted to -0.25mV. The table is like this:
1.4 Ghz -- 1400 mV
1.3 Ghz -- 1375 mV
1.2 Ghz -- 1325 mV
1.0 Ghz -- 1300 mV
800 Mhz -- 1225 mV
400 Mhz -- 1075 mV
200 Mhz -- 1000 mV
100 Mhz -- 975 mV
This is quite higher that numbers posted on this forum, but tha'ts what default Samsung voltages are. You can UV it yourself with SetCPU easily.
Let me know ASAP if you find any problems!
Forgot to update kernel version number so it reads 1.0b3 in the settings. Don't have time to tinker with it today anymore, so just ignore it.
EDIT2: Updated version info and re-uploaded. Noting else changed.