FUD Zilla reckons Intel is going to put an overclock lock on its Nehalem processors. The site says there won't be an easy workaround and that overclockers will be forced to buy the more expensive Bloomfield processors:
Until now, we didn't know how this had been implemented, but we've learned some more about it and it looks like there is no easy workaround. As these processors have the memory controller and a few more bits integrated into the CPU itself, Intel suddenly has a lot more control than it has had with past designs that utilized a separate chipset which contains the memory controller.
If it does happen I hope AMD shakes up the enthusiast market by then.