It looks like I should have ordered online from Apple, instead of having bought my new 1.33GHz 12" PB from the local Apple store.
Anyhow I'm happy. I upgraded from an 867MHz 12" PB, and it only cost me about $250 (as I sold the other one). The only spec in which I downgraded was RAM... the old one had 640, and the new one has 512. The RAM came free. It came from the 1.25GHz 15" PB of a friend. He upgraded to 2x512 modules and gave me his old 2x256 sticks. 🙂