Here is a little but important “feature” of iCloud on iOS that I stumbled upon. If you’re currently working on iCloud support for an iOS game, you _need_ this.
It turns out that all iCloud files that you create on your iOS devices in your own testing apps are automagically synchronized to your development machine, into the ~/Library/Mobile Documents folder. This is a huge time saver for debugging. You can also go in and delete files, also removing them from iCloud.
I couldn’t find any documentation on this. If there is, please post it in the comments!