"First of all, not all P4s can handle a 166 FSB. Secondly, the FSB is not there just for the CPU. Memory, PCI, and AGP use the FSB as well to communicate with the CPU. So even if your P4 could handle 166 FSB, those other devices may limit the extent of your FSB overclock."
I can't imagine anybody that plans to overclock buying a board that didn't have an agp/pci lock.
So that brings us to the cpu/memory again. Obviously not all P4's can overclock to 166, that was an example, but some can overclock even higher with the right setup and C1 stepping. My point is that the bandwidth increases as the FSB increases so as long as you maintain a synchronous setup AND you can overclock your cpu to a 166 fsb you can have your cake and eat it too.
Considering that intel plans on releasing 800fsb P4's in 5-6mo it's safe to say that a lot of P4's on the market today have a lot of headroom above 533.
That said, I still plan on postponing my project 6mo because to me there are to many things coming with the canterwood chipset that aren't present in GB.
It should still give me enough time to complete my video editing project by next Christmas
K