I haven't found info on the kernel testing feed yet, but here is the website of the creator of the kernel unixpsycho. You can download the ipk from there and use WOSQI to install it. Remember to remove all other custom kernels or overclocking patches. Also Govnah is required and screenstate is required 500 min 1005 max. Be sure to head over to PreCentral and give him a thanks. So far it is faster than 800 Mhz but not by much. I am doctoring my phone to start from fresh to see if that makes a difference. Best of luck y'all.
http://unixpsycho.com/palm-pre/