Can you add support for saving documents to icloud?
Don’t want to burst your bubble but it’s not going to happen unless they release it onto the App Store… which seems very unlikely.
Not saying it won’t happen, but don’t hold your breath. Dropbox support, on the other hand, is most likely possible via a module.
Good news: I think that with OS X Yosemite every application will be able to store files on iCloud Drive.
What I wonder if I will be able to open my current iCloud-stored TextEdit files with Atom on Yosemite. That would be great.