Apple has released an update for users of Mac OS X, adding the abilities of MobileMe to the operating system. The update is available through software update.
“The Mac OS X Update For MobileMe is recommended for users running Mac OS X Leopard 10.5.4 and includes general system fixes that enhance your Mac for MobileMe,” reads Apples description of the update.
There is no indication as to what exactly this update fixes or updates.