Apple is expected to add a backlit keyboard to the new MacBook Air models when it refreshes the laptop line, AppleInsider reported on Tuesday. The Cupertino-based firm used to offer the feature on its high-end MacBook Air laptop, but oddly omitted keyboard backlighting during the last refresh. Apple is expected to take the wraps off of its new models during the week of July 21st, and the notebooks are rumored to offer the new Thunderbolt I/O port in place of a DisplayPort, OS X Lion, and Intel’s new Sandy Bridge processors. Other rumors have also suggested that Apple will offer 400MBps SSD modules. We’ve heard that Apple has an overnight shift planned on July 13th, too, so we’re still keeping our fingers crossed that an announcement could come even sooner.