Apple released OS X Lion just five days ago and it looks like they are already preparing an update for their new operating system. The update which has been reported is OS X 10.7.2 which is supposed to add support for iCloud. The version of Lion which was shipped is still integrated with MobileMe and we would expect a OS update to give iCloud features to Apple's desktop operating system.
With iOS 10.7.2 probably aimed around the same time iOS 5 is released, users would probably have OS X 10.7.1 released soon.
source - BGR