Can I use iCloud storage for iOS apps?

Hello,

I'm trying to work out if it's possible to use iCloud to save/load data across devices with iOS apps created using Air.

I know there is a lot of talk about now meeting the Apple data storage guidelines eg http://www.saumitrabhave.com/2011/11/air-ios-solving-apps-must-follow-ios.html

What I can't understand is if I actually want to use iCloud to save data a user has created in my app (ie condition 1 of the storage guidelines - user generated data, cannot be re-created by application).

If I was to save this user data to the <Application>/Documents directory...

a) would it be backed up by iCloud and meet Apples requirements?

b) if my application was installed on another device is there any way, using Air/AS3, to know that a file has been updated and read the file?

Please let me know if this doesn't make sense... still trying to get my head around how it all works.

Thanks.