Nice, but I don't think this kind of functionality - updating multiple things at once - belongs at the application layer (iPhone or otherwise). API's need to be

Nice, but I don't think this kind of functionality - updating multiple things at once - belongs at the application layer (iPhone or otherwise). API's need to become common enough for you to be able to instruct Twitter to push your tweets to any URL you'd like, using various interfaces. Seriously guys, this was the original vision of object orientation in Smalltalk. Objects need global URI's, interfaces (protocols, message systems, whatever you want to call them), and the ability to communicate. These are ideas from the 80's! Get it right already!