Is it possible that Apple does or will provide an API for Siri? It would be great if I can be sipping my coffee and say,
User: Hey Siri, could you please open Angry Birds; Level 4 and throw a first bird for me. Make sure you at least hit one green pig or it's coming out of your paycheck.
Siri: Yes sure, I will do that for you.
Is this possible? And would you think Apple will provide this to us?
There is no API and there is no indication of it changing anytime soon. There are private headers that you can look at by decompiling the SDK. This is a great synopsis:
You can be clever like RTM though, this is as close as it gets: