It seems like the only way to get notified of certain events is to poll the site continuously. And as per the current policy, it seems like there should be at least a 2 minute delay between requests.

So therefore, I am proposing a notification system whereby an app can 'register' for certain events and receive a notification when they occur.

Example:

• an app calls /0.8/notify/questions?intitle=silverlight
• the app provides a URL
• whenever a new question with 'silverlight' in the title is posted, the URL specified above is called