Okay, I just went back to Costco, and I can clarify some things:
* Pothead, the extra $7 you got back was for the pack of 24x discs, NOT 32x discs. The extra $7 rebate is clearly for those discs, which are made in Taiwan and are indeed Ritek's. However, that's not what we're talking about here. There is no extra $7 rebate on the 32x discs.
* All of the 100packs that were one single pack of 100 CDR's were indeed "Made in Japan" -- Taiyo Yuden. There were also several 100-packs that were two 50-packs (side by side) shrinkwrapped together, and those were Made in Taiwan -- Ritek. Be sure you're looking for the single-wrapped 100 pack, and make sure it says Made in Japan.