So many idiots with stupid posts. The only drawback to iCloud is it's more expensive than, say Amazon cloud storage (though it's cheaper than Dropbox).
Worried about getting hacked or Apple snooping your files? Guess you better stop using Hotmail, Gmail, Live or any other online service. Better yet, stop using the internet altogether.
Make an FTP server at home and install a client on your mobile device? Stupid. Now I need to keep a computer running all the time at home consuming electricity. I have to pay TWICE the bandwidth (once from my home PC and once back to my mobile device). Oh, and even then all I've got is nothing more than a simple file storage system.
Tell me, Mr. Smart Guy, how is that FTP server going to back up my phone? And I mean ALL of my phone, not just stored documents or music. How is that FTP server going to allow me to keep my calendars, contacts, e-mails and other data/documents in sync for multiple people to view and/or work on?