Apple held its big Back to the Mac event this week, showing previews of software and hardware to come. On the hardware side, it has a new, aluminum body MacBook Air. Weighs less than three pounds and boasts up to 30 hours of standby time, five to seven hours of actual use. It comes in two sizes: 13.3 inches and 11.6, which teeters right on the brink of netbook territory, a category of computers CEO Steve Jobs dumped on just a few months ago. Both of these new models also lose traditional spinning hard drives; they use solid-state flash memory for instant-on capability.
