On Mac OSX (Mavericks) you can find your ‘iCloud’ documents in the relevant application folder like this:
Each application keeps its own documents in a sandboxed folder.
You can make an alias for a file and then move that to an appropriate folder, for example, I’m using Byword on the Mac, iPad and iPhone, thus I want my ‘List.md’ file kept in iCloud. Putting an alias to it on the desktop makes it easy to edit on the Mac. Using GeekTool I can have it automagically display the contents of ‘List.md’ on the desktop, essentially a ‘live’ file no matter where I edit it, even from iDevices.
Dave Winer on the ‘pulse of Apple’ . Makes sense. Makes me think “what is the pulse of company I work for?”.
..however superior Apple’s design is, it’s their business and operations strength — the Cook side of the equation — that is furthest ahead of their competition, and the more sustainable advantage. via Daring Fireball: The New Apple Advantage.