Thanks. I scanned that, but mixed up the discussion of iCloud and iCloud KeyChain, of which Apple claims:

"iCloud Keychain allows users to securely sync their passwords between iOS devices and Mac computers without exposing that information to Apple."

So, I guess somebody should write a 'notepad' for iOS and Mac OS X that stores its data as secure notes in the KeyChain (assuming that secure notes get synced, too)