Probably Dave Hyatt.
I don't have any inside info here, but I'd be willing to bet Darin Adler was one of those other REDACTEDs. He was an early Safari guy, as well as tech lead for Mac OS 7 and worked at General Magic, so Google would probably have been pretty happy to get their hands on him.
I also think parakey was the startup referenced as his other option (Blake Ross and Joe Hewitt)
Steve Jobs was obsessed with loyalty, so I figured that anyone applying for a job at Google would be dead to Apple as long as Jobs was there. Hyatt was one of these guys who even Jobs would probably have hesitated to blacklist, though, so maybe it really is him they're referring to here, and he ultimately remained with Apple.