The actual hard drive is different by stores. The hard drive on staples.com is ata 66 40 gig drive, and I called to confirm. Anyway, it's out of stcok around my home, and they said they won't restock this item.
Well, they're probably getting rid of ata 66 to restock with newer version ofata 100 drives, and for Schmo, the store might screwed up, so they gave him the new model Diamonmax plus 45. Good for him.