Apple's having a Back To Mac event this Wednesday, the 20th of October, and the main guesses of the unveilings revolve around the Macbook Air. There have already been rumours of an updated Macbook Air with USB ports and enhanced SSD. More rumours indicate that there might be an 11.6″ Macbook Air in addition to the 13.3″ version and it will be unibody. There are rumours regarding the processor as well. The Macbook Air would still be powered by the Intel Core 2 Duo ULV but the new version would have an AMD option.
Other speculations are about iLife 11 and OS X 10.7. The invite for the event has a graphic of a lion on the Apple logo which hints at 'Lion' being the new operating system.