We suppose after a reasonably high-profile defection of one of AMD's own to Apple, the Sunnyvale company had to exact revenge. That payback was announced today in the form of Jim Keller, the now former platform architecture head in Cupertino, who will be joining AMD as corporate vice president and chief architect of its microprocessor unit. In a statement, the company sayed that Keller will be leveraging his "low-power design expertise," possibly as part of its oft-rumored ARM
