According to
Wikipedia, "The first step toward a better understanding of SATA is to know that SATA II is not the brand name for SATA’s 3Gb/s data transfer rate, but the name of the organization formed to author the SATA specifications. The group has since changed names, to the Serial ATA International Organization, or SATA-IO."
Second, you can put a 3Gb/s drive into your MacBook without any problem. It will only run at the MacBook's speed of 1.5Gb/s.
The Toshiba drive you mentioned will work fine. But I too, like NewEgg.com. Check
there.
Chris