“iFixIt notes that, although it looks similar, it’s not a standard Torx screw. Worse, there are no readily available screwdrivers that can remove it,” O’Grady reports. “Even iFitIt’s own 54-bit driver kit doesn’t have the pentalobe-head screwdriver, adding to the frustration.”
MacDailyNews Take: Actually, iFixtit’s US$9.95 “iPhone 4 Liberation Kit” allows users to to replace Pentalobe screws with Phillips screws (which, of course, is why this story is likely being floated in the first place.)
O’Grady reports, “Pentalobular screws first appeared in the mid-2009 MacBook Pro to prevent you from replacing the the battery and Apple is using a similar screw on the outer case of the current MacBook Air. Obviously, it’s Apple perogative to do as they choose, but it’s like DRM and copy-protection before that, it’s not going to stop a determined individual. So, what’s the point?”
Full article here.
MacDailyNews Take: Apple simply strives to be cutting edge, right down to the screws. 
