So with iDisk gone, what do I do? Apple hasn't said, but it seems the company has ceded the space to the likes of Dropbox and Microsoft's Windows Live SkyDrive.
For online backup purposes, you may want to look into services like Carbonite or Mozy . The former charges $55 per year for unlimited storage, while the latter provides 2GB free, with 50GB of space costing $6 per month.
What's happening with MobileMe's iWeb and Gallery? They'll vanish in June 2012.
Neither service is making the move to iCloud, so June 30, 2012 is the date to remember: After that, a site (or sites) you've published to iWeb, and photos or videos you've stored on Gallery, will be inaccessible.
Apple's recommended that users move their iWeb sites to another hosting firm, and either sync Gallery with iPhoto '08 or later, or download the photos and movies to the hard drive of a Mac or Windows PC.
Can I keep my .me or .mac email address? Yes. "If you have an active MobileMe account when you sign up for iCloud, you'll be able to keep your me.com or mac.com email address," Apple said.
Will iCloud sync my passwords between Macs like MobileMe? Nope. "Syncing of Mac Dashboard widgets, keychains, Dock items, and System Preferences will not be part of iCloud," Apple said in its transition FAQ.
"Keychain" is Apple's name for its password management system, so once you shift to iCloud, you won't be able to sync passwords between Macs using Apple's service.
Instead, you'll have to switch to a password service or manager that supports synchronization. The $40 1Password, for instance, stores passwords on all your personally owned Macs, and uses Dropbox to sync. A free alternative is LastPass, an all-online password manager that syncs across multiple browsers, OSes, and devices.
Both Dropbox -- which 1Password relies on for sync -- and LastPass have had confirmed or suspected security breaches this year, however, so the cautious may want to standardize on Chrome or Firefox on all their Macs, then use the browser's built-in sync service.
What about Find My iPhone ? It will live on in iCloud, says Apple.
According to reports, Mac OS X 10.7, aka Lion, will also support a Find My Mac tool serviced by iCloud. Like the long-available Find My iPhone, the new tool will let users pinpoint the location of a lost or stolen Mac.
iCloud's 5GB of storage space seems pretty puny. Can I opt for more? Apple says you can, but hasn't spelled out how much additional space will cost.