Digitimes are reporting that either a 15" Macbook Air or Ultra Slim Macbook Pro could be coming our way in March.
"Upstream suppliers of Apple have recently started shipping a small volume of components for a 15-inch ultra-thin notebook model from Apple in November and the device could be either MacBook Air or just a thinner MacBook Pro. The new MacBook is expected to appear as early as the second quarter of 2012, according to sources from the upstream supply chain."
My money is on a redesigned Macbook Pro, which will include SSD and no optical drive. Time to start saving my pennies !!