If you have a 133 Mhz fsb capable board (Asus a7v133, kt7a, a7m, etc) then by all means get the 133 Mhz version. It will be faster than the 100 Mhz version. Overclocking would be easier on the 133 Mhz version because of the lower clock multiplier. That said it won't be easy to overclock either without an awesome cooler setup. (That tom's computer has a 600+ dollar cooler on it!
It sure does absolutely destroy the P4 they compared it against though... )
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bloom25
THUNDERBIRDS