Not to beat a dead horse, but this is what really concerns me about iOS. It isn't that these hooks are missing, it's that Apple has a vested interest in never providing them.
Google has a similar interest, but has provided them in Android anywyay. The lack of an Intents system in iOS is annoying, and I'm concerned we'll never see one added.
I've run out of my iCloud free plan and will need to buy some memory soon even though I've got gigs of Dropbox that I'd much better prefer to use !