well, sure it can...it depends on whether or not mobo manufacturers will implement FSB speeds above 133, and moreover, whether or not they implement proper PCI/CLK ratios....
i mean, most boards will let u run 166FSB but they run the AGP and PCI clock out of spec...
officially the KT333 does NOT support 166mhz fsb, obviously....there's no AMD chip sporting that FSB speed after all.