One of the things that came up in the discussion on this question was the fact that the 10K limits might not be enough for websites that want to use the SE API.
It might be a good idea to add a
Request key limit increase link on the app page or at least a note explaining what is the official way of making such requests.
Update: How API keys work just got updated with some info that touches this topic.
I still think it would be a terrific idea if the app management page actually showed some rough stats on how close to hitting the key limit it's coming to and had a link to that particular question.