Be extremely careful about entrusting your data to iCloud, especially when moving a MobileMe account over. At least I have a system backup for all the lost Calendar items. It'll take forever to figure out how much data I lost in Contacts. The problem is this: iCloud's clients in iCal and IOS 5 NEVER warn you when recent data is about to be erased or changed by older data. Thankfully, I didn't use this poorly conceived and executed "product" with my documents. And MUSIC in the "cloud"? No, I don't think I'll endanger several thousand dollars' worth of music - including music from CDs I no longer have - to this so-called "system". I've been an Apple fan since the IIe. Now, not so much.