The rumor that refuses to die: Apple will port MacOS to commodity chips. Usually, the rumor holds that Apple will climb into bed with Intel; this time, it's AMD.
Nevertheless, these observers report that Apple has been serious enough about its ace in the hole to seed a few lucky civilians with prototype boxes – delivered heavily swaddled in layers of cloak-and-dagger security, natch. Specifically, recent testers report taking delivery of Athlon-powered boxes that Apple had assiduously welded shut to prevent prying eyes from ogling whatever other gremlins might be lurking inside these nondescript beige chassis.
(Thanks, Phil!)