Depends on how you see it, you either have 22 days or 21 days left until MobileMe ends on June 30th, 2011.
To use iCloud you need at least OS X Lion or iOS 5. One main reasons people stay with Mac OS X Snow Leopard is the applications. OS X Lion no longer supports Rosetta application. That means you have to upgrade the applications before making the move to OS X Lion.
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