Apple "Back to the Mac" Event Oct. 20: New OS X and MacBook Air?

It is reported that Apple issued invitations for "Back to the Mac" special media event to be held next Wednesday, October 20th  at the company's campus in Cupertino, California. This time the invitation contains an image of a lion peeking out from behind the Apple logo. It conveys the suggestion that Apple is going to seed a new Mac OS X 10.7. The next-generation operating system is commonly suggested being named as “Lion”. Also it is expected that the company's media event may focus on notebooks if new hardware is included on the agenda. Apple has refreshed at least a portion of its notebook line each October or November for the last several years.