I've run a few different permutations of Lehto's 900 MHz and titan's kernals set to 900 / 950 MHz for several days each over the past full week. No problems with any of them. I've just installed titan's ulv kernal. I immidiately got a spontaneous reboot with my first attempt at 1 GHz, so I've backed down to 950 again. The keyboard feels MUCH cooler. I'm very happy with the work these guys are doing!