Ever since Apple replaced the trusty iBook and PowerBook G4 series of laptops with the MacBook line in 2006, Apple fanboys and -girls round the world have been clamouring for a smaller, lighter ultraportable Mac, along the lines of the 12" PowerBook or 12" iBook like my wife owns. The 13" MacBook (like mine) is a fine computer, but it's not quite as backpackable as its predecessors.
Now that her iBook is coming up on its third birthday, my wife might appreciate fresh rumours that Apple might be announcing a super-thin MacBook in January. These rumours have been around forever (almost as long as those about a Mac tablet), but they're picking up steam this week.
I wouldn't place any bets, but if you're in the market for a small Mac notebook (rather than a ginormous one, which Apple has been happy to sell you for years) and can wait till January, you might just be in luck. Or not. You never know with these guys.