There seems to be a bug on the site....if you hit Select on the 14inch, 1.33GHz (middle one), then at the customize screen, in the top right where it lists the current specs, it lists the processor as a 1GHz PowerPC G4, not 1.33GHz...
edit:
Hehe, looks like they forgot to update it...the first two on the left, when gone through the same procedure, say 1GHz, and the one all the way to the right, says 1.2GHz