I rebased on the latest source from Samsung, JPX. Yes, it's still i9k based. Hopefully it helps a little with battery and such, won't know till it's been out for a while. The speedmod patch has also been updated, but the OC patch is the same. I also included my backport of the auto-group scheduler patch. So far, both of them are working well for me.
Both kernels are voodoo enabled and will enable voodoo if you don't already have it. If you don't want that, you need to install the voodoo-disable zip before flashing, or just put the disable-lagfix file in place before flashing. If you already have voodoo enabled on your phone, you do NOT need to disable it before flashing these kernels, as long as your current kernel has voodoo recovery (red Clockwork recovery), you are good to go.
Tested on Nero V4, but should work on other Froyo based ROMs as well.
If you are going to try the OC version, please download both of them and have the normal version ready, just in case. You can also use adb push from Clockwork if you can get it booted to recovery. Clockwork also has USB storage you can enable to be able to mount your phone's memory cards from a computer, so that you can put the non-OC version on there if you get stuck.
Speedmod patch from here: http://forum.xda-developers.com/showthread.php?t=822756
OC patch from here: http://forum.xda-developers.com/showthread.php?t=822027 (v217, waiting on source for v300)
Changes from v2.5: