Fits in with the other recent MacBook Air rumors, except that this one gives a precise release date. Link IDF San Francisco is August 19~21. Maybe Apple agreed to release the Penryn MacBook Air at IDF in exchange for 2+ GHz ≈20 W CPUs. This would also mean that the Apple-Intel relationship is still going strong. It would also be reasonable to expect to also see the glass trackpad then, unless either the glass trackpad rumor is wrong or the MacBook Air won't have one (but the other notebooks will).