Apple Store employees have been told to work overnight on July 13th in order to prepare the release of Mac OS X Lion or a new MacBook Air. This report has been told by 9to5Mac site and this very site has mentioned about the predictions that Apple will release Mac OS X Lion on July 14th.
Earlier 9to5Mac mentioned that they are expecting Lion release and also new MaceBook Airs. Chances are there that MacBook Air release can bring a faster storage, a sandy Bridge CPU and Thunderbolts. They also says they have heard some stories of backlit keyboards, 3Gs, a black option and interesting 15 inch MacBook Air HD but at this point it seem doubtful.